Jens Dilling

Research Professor in the Department of Physics

Physics

jens.dilling@duke.edu

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Selected Publications

Electroweak Nuclear Properties from Single Molecular Ions in a Penning Trap.

Journal Article Physical review letters · July 2024 We present a novel technique to probe electroweak nuclear properties by measuring parity violation (PV) in single molecular ions in a Penning trap. The trap's strong magnetic field Zeeman shifts opposite-parity rotational and hyperfine molecular states int ... Full text Cite

15 years of precision mass measurements at TITAN

Journal Article European Physical Journal A · April 1, 2024 Atomic masses represent key ingredients to understand the structure of atomic nuclei. In particular, they provide insights into the nuclear binding energy and, thus, into the combined forces that govern the stability of atomic nuclei. Given their high expe ... Full text Cite

Search for two-neutrino double-beta decay of ¹³⁶Xe to the excited state of ¹³⁶Ba with the complete EXO-200 dataset

Journal Article Chinese Physics C · October 1, 2023 A new search for two-neutrino double-beta (2νββ) decay of 136Xe to the excited state of 136Ba is performed with the full EXO-200 dataset. A deep learning-based convolutional neural network is used to discriminate signal from background events. Signal detec ... Full text Cite

Generative adversarial networks for scintillation signal simulation in EXO-200

Journal Article Journal of Instrumentation · June 1, 2023 Generative Adversarial Networks trained on samples of simulated or actual events have been proposed as a way of generating large simulated datasets at a reduced computational cost. In this work, a novel approach to perform the simulation of photodetector s ... Full text Cite

Improved high-precision mass measurements of mid-shell neon isotopes

Journal Article Nuclear Physics A · May 1, 2023 New mass values measured with the TITAN MR-TOF-MS are reported for the short-lived isotopes 24−26Ne, produced at TRIUMF's ISAC facility using a uranium carbide target and cold FEBIAD ion source. A least-squares adjustment within the framework of the Atomic ... Full text Cite

Searching for dark matter with plasma haloscopes

Journal Article Physical Review D · March 1, 2023 We summarize the recent progress of the Axion Longitudinal Plasma Haloscope (ALPHA) Consortium, a new experimental collaboration to build a plasma haloscope to search for axions and dark photons. The plasma haloscope is a novel method for the detection of ... Full text Cite

Exploring the limits of existence of proton-rich nuclei in the Z=70-82 region

Journal Article Physical Review C · February 1, 2023 α-, β-, and proton-decay energies have been combined with TITAN mass values for Yb150-157 to expand and refine the mass surface in the proton-rich Z=70-82 region. The calculations were performed using the Atomic Mass Evaluation (AME) algorithm, resulting i ... Full text Cite

Search for MeV electron recoils from dark matter in EXO-200

Journal Article Physical Review D · January 1, 2023 We present a search for electron-recoil signatures from the charged-current absorption of fermionic dark matter using the EXO-200 detector. We report an average electron-recoil background rate of 6.8×104 cts kg-1 yr-1 keV above 4 MeV and find no statistica ... Full text Cite

Collision-Induced Dissociation at TRIUMF's Ion Trap for Atomic and Nuclear science

Journal Article International Journal of Mass Spectrometry · December 1, 2022 The performance of high-precision mass spectrometry of radioactive isotopes can often be hindered by large amounts of contamination, including molecular species, stemming from the production of the radioactive beam. In this paper, we report on the developm ... Full text Cite

Summit of the N=40 island of inversion: Precision mass measurements and ab initio calculations of neutron-rich chromium isotopes

Journal Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · October 10, 2022 Mass measurements continue to provide invaluable information for elucidating nuclear structure and scenarios of astrophysical interest. The transition region between the Z=20 and 28 proton shell closures is particularly interesting due to the onset and evo ... Full text Cite

Investigating nuclear structure near N=32 and N=34: Precision mass measurements of neutron-rich Ca, Ti, and V isotopes

Journal Article Physical Review C · August 1, 2022 Nuclear mass measurements of isotopes are key to improving our understanding of nuclear structure across the chart of nuclides, in particular, for the determination of the appearance or disappearance of nuclear shell closures. We present high-precision mas ... Full text Cite

Simulations of a new electron gun for the TITAN EBIT

Conference Journal of Physics: Conference Series · April 25, 2022 Penning trap mass spectrometry is the tool of choice for mass measurements to test the Standard Model or lay the nuclear-physics foundation of neutrino physics due to the high precisions achievable. This precision can be further boosted by higher charge st ... Full text Cite

Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes

Journal Article Physical Review C · April 1, 2022 Nuclear properties across the chart of nuclides are key to improving and validating our understanding of the strong interaction in nuclear physics. We present high-precision mass measurements of neutron-rich Fe isotopes performed at the TITAN facility. The ... Full text Cite

The EXO-200 detector, part II: Auxiliary systems

Journal Article Journal of Instrumentation · February 1, 2022 The EXO-200 experiment searched for neutrinoless double-beta decay of 136Xe with a single-phase liquid xenon detector. It used an active mass of 110 kg of 80.6%-enriched liquid xenon in an ultra-low background time projection chamber with ionization and sc ... Full text Cite

Characterization of a Spatially resolved multi-element laser ablation ion source

Journal Article International Journal of Mass Spectrometry · February 1, 2022 A laser ablation ion source (LAS) is a powerful tool by which diverse species of ions can be produced for mass spectrometer calibration or surface study applications. It is necessary to frequently shift the laser position on the target to selectively ablat ... Full text Cite

Searching for New Physics with DarkLight at the ARIEL Electron-Linac

Conference Journal of Physics: Conference Series · January 1, 2022 The search for a dark photon holds considerable interest in the physics community. Such a force carrier would begin to illuminate the dark sector. Many experiments have searched for such a particle, but so far it has proven elusive. In recent years the con ... Full text Cite

NEXO: Neutrinoless double beta decay search beyond 10²⁸year half-life sensitivity

Journal Article Journal of Physics G: Nuclear and Particle Physics · January 1, 2022 The nEXO neutrinoless double beta (0νββ) decay experiment is designed to use a time projection chamber and 5000 kg of isotopically enriched liquid xenon to search for the decay in 136Xe. Progress in the detector design, paired with higher fidelity in its s ... Full text Cite

Mass measurements of Ga 60-63 reduce x-ray burst model uncertainties and extend the evaluated T=1 isobaric multiplet mass equation

Journal Article Physical Review C · December 1, 2021 We report precision mass measurements of neutron-deficient gallium isotopes approaching the proton drip line. The measurements of Ga60-63 performed with the TITAN multiple-reflection time-of-flight mass spectrometer provide a more than threefold improvemen ... Full text Cite

Commissioning and performance of TITAN's Multiple-Reflection Time-of-Flight Mass-Spectrometer and isobar separator

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · December 1, 2021 TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN) has specialized in fast Penning Trap mass spectrometry of very short-lived radioactive isotopes. The facility has been upgraded with a Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS) ... Full text Cite

Search for Majoron-emitting modes of $^{136}$Xe double beta decay with the complete EXO-200 dataset

Journal Article Physical Review D: Particles, Fields, Gravitation and Cosmology · September 3, 2021 A search for Majoron-emitting modes of the neutrinoless double-beta decay of $^{136}$Xe is performed with the full EXO-200 dataset. This dataset consists of a total $^{136}$Xe exposure of 234.1 kg$\cdot$yr, and includes data with detector upgrades that hav ... Open Access Link to item Cite

Electroweak Nuclear Properties from Single Molecular Ions in a Penning Trap.

15 years of precision mass measurements at TITAN

Search for two-neutrino double-beta decay of ¹³⁶Xe to the excited state of ¹³⁶Ba with the complete EXO-200 dataset

Generative adversarial networks for scintillation signal simulation in EXO-200

Improved high-precision mass measurements of mid-shell neon isotopes

Searching for dark matter with plasma haloscopes

Exploring the limits of existence of proton-rich nuclei in the Z=70-82 region

Search for MeV electron recoils from dark matter in EXO-200

Collision-Induced Dissociation at TRIUMF's Ion Trap for Atomic and Nuclear science

Summit of the N=40 island of inversion: Precision mass measurements and ab initio calculations of neutron-rich chromium isotopes

Investigating nuclear structure near N=32 and N=34: Precision mass measurements of neutron-rich Ca, Ti, and V isotopes

Simulations of a new electron gun for the TITAN EBIT

Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes

The EXO-200 detector, part II: Auxiliary systems

Characterization of a Spatially resolved multi-element laser ablation ion source

Searching for New Physics with DarkLight at the ARIEL Electron-Linac

NEXO: Neutrinoless double beta decay search beyond 10²⁸year half-life sensitivity

Mass measurements of Ga 60-63 reduce x-ray burst model uncertainties and extend the evaluated T=1 isobaric multiplet mass equation

Commissioning and performance of TITAN's Multiple-Reflection Time-of-Flight Mass-Spectrometer and isobar separator

Search for Majoron-emitting modes of $^{136}$Xe double beta decay with the complete EXO-200 dataset

Mass Measurements of Neutron-Deficient Yb Isotopes and Nuclear Structure at the Extreme Proton-Rich Side of the N=82 Shell.

Journal Article Physical review letters · September 2021 High-accuracy mass measurements of neutron-deficient Yb isotopes have been performed at TRIUMF using TITAN's multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS). For the first time, an MR-TOF-MS was used on line simultaneously as an isobar sep ... Full text Cite

Commissioning of a multi-purpose offline ion source at the TITAN experiment

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · July 21, 2021 The controlled focusing and transport of ion beams is of paramount importance in particle accelerators, high energy beamlines, and detector systems, as it determines the sensitivity and resolution of the instruments. Therefore, it is essential to model the ... Full text Cite

Event reconstruction in a liquid xenon Time Projection Chamber with an optically-open field cage

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · June 1, 2021 nEXO is a proposed tonne-scale neutrinoless double beta decay (0νββ) experiment using liquid 136Xe (LXe) in a Time Projection Chamber (TPC) to read out ionization and scintillation signals. Between the field cage and the LXe vessel, a layer of LXe (“skin” ... Full text Open Access Cite

Examining the nuclear mass surface of Rb and Sr isotopes in the A≈104 region via precision mass measurements

Journal Article Physical Review C · April 1, 2021 Background: The neutron-rich A≈100, N≈62 mass region is important for both nuclear structure and nuclear astrophysics. The neutron-rich segment of this region has been widely studied to investigate shape coexistence and sudden nuclear deformation. However, ... Full text Cite

Mass measurements of neutron-rich indium isotopes for r -process studies

Journal Article Physical Review C · February 1, 2021 A new series of neutron-rich indium mass measurements is reported from the TITAN multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS). These mass measurements cover In125-134 (N=76-85) and include ground states as well as isomeric states. The m ... Full text Cite

Precision Mass Measurements of Neutron-Rich Scandium Isotopes Refine the Evolution of N=32 and N=34 Shell Closures.

Journal Article Physical review letters · January 2021 We report high-precision mass measurements of ^{50-55}Sc isotopes performed at the LEBIT facility at NSCL and at the TITAN facility at TRIUMF. Our results provide a substantial reduction of their uncertainties and indicate significant deviations, up to 0.7 ... Full text Cite

Limits on the Existence of sub-MeV Sterile Neutrinos from the Decay of ^{7}Be in Superconducting Quantum Sensors.

Journal Article Physical review letters · January 2021 Sterile neutrinos are natural extensions to the standard model of particle physics and provide a possible portal to the dark sector. We report a new search for the existence of sub-MeV sterile neutrinos using the decay-momentum reconstruction technique in ... Full text Cite

Measuring the half-life of n-rich ¹⁰⁰Rb with the TITAN MR-TOF-MS

Conference Journal of Physics: Conference Series · December 23, 2020 Multiple-reflection time-of-flight mass spectrometers (MR-TOF-MS) have been demonstrated to have a mass resolving power in the range of few hundreds of thousand. The TITAN MR-TOF-MS has been used to separate isobaric impurities and measure masses of many r ... Full text Cite

Reflectance of Silicon Photomultipliers at Vacuum Ultraviolet Wavelengths

Journal Article IEEE Transactions on Nuclear Science · December 1, 2020 Characterization of the vacuum ultraviolet (VUV) reflectance of silicon photomultipliers (SiPMs) is important for large-scale SiPM-based photodetector systems. We report the angular dependence of the specular reflectance in vacuum of SiPMs manufactured by ... Full text Cite

High-precision mass measurement of neutron-rich 96Kr

Journal Article Hyperfine Interactions · December 1, 2020 While the nuclear deformation in the region around Z = 40 and N = 60 has been studied in great detail, the possible onset of nuclear deformation in the isotopic chain of krypton (Z = 36) is still a subject of controversy. Here, we present a high-precision ... Full text Cite

Towards high precision mass measurements of Highly Charged Ions using the Phase-Imaging Ion-Cyclotron-Resonance technique at TITAN

Journal Article Hyperfine Interactions · December 1, 2020 High-precision mass measurements of short-lived ions have been traditionally performed using the Time-of-Flight Ion-Cyclotron-Resonance technique (ToF-ICR) with Singly Charged Ions (SCI) in Penning traps. In order to reach higher precision, TITAN is curren ... Full text Cite

Measurements of electron transport in liquid and gas Xenon using a laser-driven photocathode

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · August 21, 2020 Measurements of electron drift properties in liquid and gaseous xenon are reported. The electrons are generated by the photoelectric effect in a semi-transparent gold photocathode driven in transmission mode with a pulsed ultraviolet laser. The charges dri ... Full text Cite

Direct Measurement of the ^{7}Be L/K Capture Ratio in Ta-Based Superconducting Tunnel Junctions.

Journal Article Physical review letters · July 2020 We report a high-statistics measurement of the L/K orbital electron capture ratio in ^{7}Be embedded in cryogenic Ta. The thin Ta film formed part of a high-resolution superconducting tunnel junction radiation detector that was used to identify the signals ... Full text Cite

Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment

Journal Article Physical Review C · June 1, 2020 Liquid xenon (LXe) is employed in a number of current and future detectors for rare event searches. We use the EXO-200 experimental data to measure the absolute scintillation and ionization yields generated by γ interactions from Th228 (2615 keV), Ra226 (1 ... Full text Cite

Measurement of the Spectral Shape of the β-Decay of ^{137}Xe to the Ground State of ^{137}Cs in EXO-200 and Comparison with Theory.

Journal Article Physical review letters · June 2020 We report on a comparison between the theoretically predicted and experimentally measured spectra of the first-forbidden nonunique β-decay transition ^{137}Xe(7/2^{-})→^{137}Cs(7/2^{+}). The experimental data were acquired by the EXO-200 experiment during ... Full text Cite

Mass measurements of neutron-rich gallium isotopes refine production of nuclei of the first r -process abundance peak in neutron-star merger calculations

Journal Article Physical Review C · February 1, 2020 We report mass measurements of neutron-rich Ga isotopes Ga80-85 with TRIUMF's Ion Trap for Atomic and Nuclear science. The measurements determine the masses of Ga80-83 in good agreement with previous measurements. The masses of Ga84 and Ga85 were measured ... Full text Cite

Reflectivity and PDE of VUV4 Hamamatsu SiPMs in liquid xenon

Journal Article Journal of Instrumentation · January 17, 2020 Understanding reflective properties of materials and photodetection efficiency (PDE) of photodetectors is important for optimizing energy resolution and sensitivity of the next generation neutrinoless double beta decay, direct detection dark matter, and ne ... Full text Cite

Improved beam diagnostics and optimization at ISAC via TITAN's MR-TOF-MS

Journal Article Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · January 15, 2020 Determination of the constituents of the radioactive ion beam (RIB) is crucial for successful experiments at low-energy RIB facilities and as such decides the fate of many experiments. Here we present the role of TITAN's Multiple-Reflection Time-Of-Flight ... Full text Cite

Vacuum requirements for Penning trap mass spectrometry with highly charged ions

Journal Article Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · January 15, 2020 Experimental investigations employing highly charged ions (HCI) typically require very strict vacuum quality. In Penning trap mass spectrometry (PTMS), HCI can significantly improve the precision and resolution of mass measurements, but they are also subje ... Full text Cite

Diversifying beam species through decay and recapture ion trapping: A demonstrative experiment at TITAN-EBIT

Journal Article Journal of Physics G: Nuclear and Particle Physics · January 1, 2020 Recapturing the recoiling daughters from radioactive decay can be a simple way to diversify beam availability at rare isotope beam facilities. In the decay and recapture ion trapping (DRIT) technique, a parent species is stored in an ion trap and left to d ... Full text Cite

Design of a multiple-reflection time-of-flight mass spectrometer for barium-tagging

Journal Article Hyperfine Interactions · December 1, 2019 The search for neutrinoless double beta decay requires increasingly advanced methods of background reduction. A bold approach to solving this problem, in experiments using 136Xe, is to extract and identify the daughter 136Ba ion produced by double beta dec ... Full text Cite

Fifty Years of TRIUMF: Canada's Particle Accelerator Laboratory

Journal Article Nuclear Physics News · October 2, 2019 The Advanced Rare Isotope Laboratory (ARIEL) is TRIUMF's flagship project to create isotopes for science, medicine, and business. ARIEL will triple TRIUMF's rare isotope beam capability and will incorporate the Isotope Separator and Accelerator (ISAC) faci ... Full text Cite

Search for Neutrinoless Double-β Decay with the Complete EXO-200 Dataset.

Journal Article Physical review letters · October 2019 A search for neutrinoless double-β decay (0νββ) in ^{136}Xe is performed with the full EXO-200 dataset using a deep neural network to discriminate between 0νββ and background events. Relative to previous analyses, the signal detection efficiency has been r ... Full text Cite

Characterization of the Hamamatsu VUV4 MPPCs for nEXO

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · October 1, 2019 In this paper we report on the characterization of the Hamamatsu VUV4 (S/N: S13370-6152) Vacuum Ultra-Violet (VUV) sensitive Multi-Pixel Photon Counters (MPPC)s as part of the development of a solution for the detection of liquid xenon scintillation light ... Full text Cite

Simulation of charge readout with segmented tiles in nEXO

Journal Article Journal of Instrumentation · September 24, 2019 nEXO is a proposed experiment to search for the neutrino-less double beta decay (0νββ) of 136Xe in a tonne-scale liquid xenon time projection chamber (TPC) . The nEXO TPC will be equipped with charge collection tiles to form the anode. In this work, the ch ... Full text Cite

Recent upgrades of the multiple-reflection time-of-flight mass spectrometer at TITAN, TRIUMF

Journal Article Hyperfine Interactions · June 1, 2019 A multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) has been installed and integrated into the TITAN experiment at TRIUMF. The MR-TOF-MS extends the capabilities and improves the performance of the TITAN experiment, for instance it provides ... Full text Cite

Off-axis electron injection into a cooler Penning trap

Journal Article Hyperfine Interactions · June 1, 2019 The TITAN facility at TRIUMF is a series of ion traps designed for precision mass spectrometry on rare isotopes. The combination of an on-line electron beam ion trap charge breeder with a Penning trap enables measurements with radioactive ions in high char ... Full text Cite

Imaging individual barium atoms in solid xenon for barium tagging in nEXO.

Journal Article Nature · May 2019 Double-β-decay involves the simultaneous conversion of two neutrons into two protons, and the emission of two electrons and two neutrinos; the neutrinoless process, although not yet observed, is thought to involve the emission of the two electrons but no n ... Full text Open Access Cite

VUV-Sensitive Silicon Photomultipliers for Xenon Scintillation Light Detection in nEXO

Journal Article IEEE Transactions on Nuclear Science · November 1, 2018 Future ton-scale liquefied noble gas detectors depend on efficient light detection in the vacuum ultraviolet (VUV) range. In the past years, silicon photomultipliers (SiPMs) have emerged as a valid alternative to standard photomultiplier tubes or large-are ... Full text Cite

Penning-Trap Mass Measurements in Atomic and Nuclear Physics

Book · October 19, 2018 Penning-trap mass spectrometry in atomic and nuclear physics has become a well-established and reliable tool for the determination of atomic masses. In combination with short-lived radioactive nuclides it was first introduced at ISOLTRAP at the Isotope Mas ... Full text Cite

The CANREB project for charge state breeding at TRIUMF

Conference AIP Conference Proceedings · September 21, 2018 CANREB (CANadian Rare isotope facility with Electron Beam ion source) at TRIUMF will deliver pure, highly charged, radioactive ion beams suitable for acceleration in order to perform experiments to investigate nuclear reactions. Radioactive isotopes at TRI ... Full text Cite

Study of silicon photomultiplier performance in external electric fields

Journal Article Journal of Instrumentation · September 17, 2018 We report on the performance of silicon photomultiplier (SiPM) light sensors operating in electric field strength up to 30 kV/cm and at a temperature of 149 K, relative to their performance in the absence of an external electric field. The SiPM devices use ... Full text Cite

Deep neural networks for energy and position reconstruction in EXO-200

Journal Article Journal of Instrumentation · August 29, 2018 We apply deep neural networks (DNN) to data from the EXO-200 experiment. In the studied cases, the DNN is able to reconstruct the relevant parameters - total energy and position - directly from raw digitized waveforms, with minimal exceptions. For the firs ... Full text Cite

Isotope abundance measurement of the half-life of the ββ -decaying nucleus Zr 96 from a 2.68 Gyr zircon sample

Journal Article Physical Review C · August 22, 2018 The decay half-life of the Zr96 isotope was measured by applying isotope geochemistry techniques to ancient (0.9 and 2.68 Gyr) ZrSiO4 (zircon) samples, with the objective to separate the single and double β-decay branches. The single β decay provides one o ... Full text Cite

Quenching of the N=32 neutron shell closure studied via precision mass measurements of neutron-rich vanadium isotopes

Journal Article Physical Review C · August 15, 2018 We performed the first direct mass measurements of neutron-rich vanadium V52-55 isotopes passing the N=32 neutron shell closure with TRIUMF's Ion Trap for Atomic and Nuclear science. The new direct measurements confirm all previous indirect results. Throug ... Full text Cite

Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double- β decay

Journal Article Physical Review C · June 15, 2018 The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to search for neutrinoless double-β (0νββ) decay in Xe136 with a target half-life sensitivity of approximately 1028 yr using 5×103 kg of isotopically enriched liquid-xenon in a ... Full text Cite

An electron beam ion trap and source for re-acceleration of rare-isotope ion beams at TRIUMF.

Journal Article The Review of scientific instruments · May 2018 Electron beam driven ionization can produce highly charged ions (HCIs) in a few well-defined charge states. Ideal conditions for this are maximally focused electron beams and an extremely clean vacuum environment. A cryogenic electron beam ion trap fulfill ... Full text Cite

Search for nucleon decays with EXO-200

Journal Article Physical Review D · April 1, 2018 A search for instability of nucleons bound in Xe136 nuclei is reported with 223 kg·yr exposure of Xe136 in the EXO-200 experiment. Lifetime limits of 3.3×1023 and 1.9×1023 yr are established for nucleon decay to Sb133 and Te133, respectively. These are the ... Full text Cite

Mass measurements of neutron-rich indium isotopes toward the N=82 shell closure

Journal Article Physical Review C · February 9, 2018 Precise mass measurements of the neutron-rich In125-130 isotopes have been performed with the TITAN Penning trap mass spectrometer. TITAN's electron beam ion trap was used to charge breed the ions to charge state q=13+ thus providing the necessary resolvin ... Full text Cite

Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector.

Journal Article Physical review letters · February 2018 Results from a search for neutrinoless double-beta decay (0νββ) of ^{136}Xe are presented using the first year of data taken with the upgraded EXO-200 detector. Relative to previous searches by EXO-200, the energy resolution of the detector has been improv ... Full text Cite

Dawning of the N=32 Shell Closure Seen through Precision Mass Measurements of Neutron-Rich Titanium Isotopes.

Journal Article Physical review letters · February 2018 A precision mass investigation of the neutron-rich titanium isotopes ^{51-55}Ti was performed at TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The range of the measurements covers the N=32 shell closure, and the overall uncertainties of the ^{5 ... Full text Cite

Characterization of an Ionization Readout Tile for nEXO

Journal Article Journal of Instrumentation · January 1, 2018 A new design for the anode of a time projection chamber, consisting of a charge-detecting "tile, is investigated for use in large scale liquid xenon detectors. The tile is produced by depositing 60 orthogonal metal charge-collecting strips, 3 mm wide, on a ... Full text Cite

High-precision QEC -value measurement of the superallowed β+ emitter Mg 22 and an ab initio evaluation of the A=22 isobaric triplet

Journal Article Physical Review C · November 6, 2017 A direct QEC-value measurement of the superallowed β+ emitter Mg22 was performed using TRIUMF's Ion Trap for Atomic and Nuclear Science. The direct ground-state to ground-state atomic mass difference between Mg22 and Na22 was determined to be QEC=4781.40(2 ... Full text Cite

Searches for double beta decay of Xe 134 with EXO-200

Journal Article Physical Review D · November 3, 2017 Searches for double beta decay of Xe134 were performed with EXO-200, a single-phase liquid xenon detector designed to search for neutrinoless double beta decay of Xe136. Using an exposure of 29.6 kg·yr, the lower limits of T1/22νββ>8.7×1020 yr and T1/20νββ ... Full text Cite

Trace radioactive impurities in final construction materials for EXO-200

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · November 1, 2017 We report results from a systematic measurement campaign conducted to identify low radioactivity materials for the construction of the EXO-200 double beta decay experiment. Partial results from this campaign have already been reported in a 2008 paper by th ... Full text Cite

Precision mass measurements of Cd 125-127 isotopes and isomers approaching the N=82 closed shell

Journal Article Physical Review C · October 23, 2017 We present the results of precision mass measurements of neutron-rich cadmium isotopes. These nuclei approach the N=82 closed neutron shell and are important to nuclear structure as they lie near doubly magic Sn132 on the chart of nuclides. Of particular n ... Full text Cite

A novel transparent charged particle detector for the CPET upgrade at TITAN

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · October 1, 2017 The detection of an electron bunch exiting a strong magnetic field can prove challenging due to the small mass of the electron. If placed too far from a solenoid's entrance, a detector outside the magnetic field will be too small to reliably intersect with ... Full text Cite

Precision mass measurements of magnesium isotopes and implications for the validity of the isobaric mass multiplet equation

Journal Article Physical Review C · September 18, 2017 If the mass excess of neutron-deficient nuclei and their neutron-rich mirror partners are both known, it can be shown that deviations of the isobaric mass multiplet equation (IMME) in the form of a cubic term can be probed. Such a cubic term was probed by ... Full text Cite

Mass determination near N=20 for Al and Na isotopes

Journal Article Physical Review C · August 31, 2017 We report on the mass measurements of Na31,32 and Al29,34,35, performed with the TITAN Penning trap mass spectrometer at TRIUMF. The mass excesses were found to be 12246(14) and 18638(37) keV for Na31,32 and -18207.77(37),-3000.5(29), and -223.7(73) keV fo ... Full text Cite

Unexpected distribution of ν1f7/2 strength in Ca 49

Journal Article Physical Review C · June 21, 2017 The calcium isotopes have emerged as a critical testing ground for new microscopically derived shell-model interactions, and a great deal of experimental and theoretical focus has been directed toward this region. We investigate the relative spectroscopic ... Full text Cite

Electroweak decay studies of highly charged radioactive ions with TITAN at TRIUMF

Journal Article Atoms · March 1, 2017 Several modes of electroweak radioactive decay require an interaction between the nucleus and bound electrons within the constituent atom. Thus, the probabilities of the respective decays are not only influenced by the structure of the initial and final st ... Full text Cite

Measurement of the drift velocity and transverse diffusion of electrons in liquid xenon with the EXO-200 detector

Journal Article Physical Review C · February 14, 2017 The EXO-200 Collaboration is searching for neutrinoless double β decay using a liquid xenon (LXe) time projection chamber. This measurement relies on modeling the transport of charge deposits produced by interactions in the LXe to allow discrimination betw ... Full text Cite

An optimal energy estimator to reduce correlated noise for the EXO-200 light readout

Journal Article Journal of Instrumentation · July 19, 2016 The energy resolution of the EXO-200 detector is limited by electronics noise in the measurement of the scintillation response. Here we present a new technique to extract optimal scintillation energy measurements for signals split across multiple channels ... Full text Cite

Development of a new RFQ beam cooler and buncher for the CANREB project at TRIUMF

Journal Article Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · June 1, 2016 A new radiofrequency quadrupole (RFQ) based ion beam cooler and buncher is under development for the CANadian Rare-isotope facility with Electron Beam ion source (CANREB) project at TRIUMF. The CANREB project requires an RFQ buncher that will efficiently a ... Full text Cite

Improvements to TITAN's mass measurement and decay spectroscopy capabilities

Journal Article Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · June 1, 2016 The study of nuclei farther from the valley of β stability than ever before goes hand-in-hand with shorter-lived nuclei produced in smaller abundances than their less exotic counterparts. The measurement, to high precision, of nuclear masses therefore requ ... Full text Cite

Cosmogenic backgrounds to 0νββ in EXO-200

Journal Article Journal of Cosmology and Astroparticle Physics · April 15, 2016 As neutrinoless double-beta decay experiments become more sensitive and intrinsic radioactivity in detector materials is reduced, previously minor contributions to the background must be understood and eliminated. With this in mind, cosmogenic backgrounds ... Full text Cite

Mass measurements of neutron-rich Rb and Sr isotopes

Journal Article Physical Review C · April 14, 2016 We report on the mass measurements of several neutron-rich Rb and Sr isotopes in the A≈100 region with the TITAN Penning-trap mass spectrometer. By using highly charged ions in the charge state q=10+, the masses of Rb98,99 and Sr98-100 have been determined ... Full text Cite

First search for Lorentz and CPT violation in double beta decay with EXO-200

Journal Article Physical Review D · April 1, 2016 A search for Lorentz- and CPT-violating signals in the double beta decay spectrum of Xe136 has been performed using an exposure of 100 kg·yr with the EXO-200 detector. No significant evidence of the spectral modification due to isotropic Lorentz-violation ... Full text Cite

Search for 2νββ decay of Xe 136 to the 01+ excited state of Ba 136 with the EXO-200 liquid xenon detector

Journal Article Physical Review C · March 8, 2016 EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless ββ decay of Xe136 to the ground state of Ba136. We report here on a search for the two-neutrino ββ decay of Xe136 to the first 0+ excited state, 01+, of Ba136 based on a 10 ... Full text Cite

Single and Double Beta-Decay Q Values among the Triplet Zr 96, Nb 96, and Mo 96

Journal Article Physical Review Letters · February 17, 2016 The atomic mass relations among the mass triplet Zr96, Nb96, and Mo96 have been determined by means of high-precision mass measurements using the JYFLTRAP mass spectrometer at the IGISOL facility of the University of Jyväskylä. We report Q values for the Z ... Full text Cite

Decay spectroscopy of highly charged radioactive ions with TITAN at TRIUMF

Conference Proceedings of Science · January 1, 2016 For modes of electroweak decay such as electron capture and internal conversion, the spatial distribution of the electron cloud of the atom plays a major role in the decay probability. By successively removing electrons from these systems the decay probabi ... Cite

Observation of a crossover of S2n in the island of inversion from precision mass spectrometry

Journal Article Physical Review C - Nuclear Physics · December 7, 2015 Mass measurements have been performed of the neutron-rich Al isotopes near N≈20, along the island of inversion. In general, the precision of the mass values was improved by an order of magnitude. Based on these new and more accurate data, we find the two-n ... Full text Cite

The MR-TOF-MS isobar separator for the TITAN facility at TRIUMF

Journal Article Hyperfine Interactions · November 1, 2015 At TRIUMF’s Ion Trap for Atomic and Nuclear Science (TITAN) a multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) will extend TITAN’s capabilities and facilitate mass measurements and in-trap decay spectroscopy of exotic nuclei that so far hav ... Full text Cite

First direct mass measurement of the neutron-deficient nucleus Al 24

Journal Article Physical Review C - Nuclear Physics · October 13, 2015 The first direct mass measurement of the neutron-deficient nucleus Al24 was performed via Penning-Trap Mass Spectrometry (PTMS) using TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). This measurement was facilitated by the use of TRIUMF's new Ion- ... Full text Cite

Balancing Basic Research with Applications: Our Responsibility to Share the Pursuit of Fundamental Research

Journal Article Nuclear Physics News · October 2, 2015 Basic research in nuclear physics provides us with fundamental insights about our physical world, from exploring the reactions that power the stars and the evolution of the cosmos, to advancing our understanding of the atomic nucleus, to enhancing the sear ... Full text Cite

Sensitivity increases for the TITAN decay spectroscopy program

Conference EPJ Web of Conferences · May 28, 2015 The TITAN facility at TRIUMF has recently initiated a program of performing decay spectroscopy measurements in an electron-beam ion-trap (EBIT). The unique environment of the EBIT provides backingfree storage of the radioactive ions, while guiding charged ... Full text Cite

The TITAN in-trap decay spectroscopy facility at TRIUMF

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · April 21, 2015 This paper presents an upgraded in-trap decay spectroscopy apparatus which has been developed and constructed for use with TRIUMFs Ion Trap for Atomic and Nuclear science (TITAN). This device consists of an open-access electron-beam ion-trap (EBIT), which ... Full text Cite

Penning trap mass measurements utilizing highly charged ions as a path to benchmark isospin-symmetry breaking corrections in Rb 74

Journal Article Physical Review C - Nuclear Physics · April 13, 2015 Penning trap mass measurements of neutron-deficient Rb isotopes have been performed at TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN) facility by utilizing highly charged ions (HCIs). As imperative for a new approach with significant gain in meas ... Full text Cite

Nuclear moments and charge radii of neutron-deficient francium isotopes and isomers

Journal Article Physical Review C - Nuclear Physics · April 8, 2015 Collinear laser fluorescence spectroscopy has been performed on the ground and isomeric states of Fr204,206 in order to determine their spins, nuclear moments, and changes in mean-squared charge radii. A new experimental technique has been developed as par ... Full text Cite

An RF-only ion-funnel for extraction from high-pressure gases

Journal Article International Journal of Mass Spectrometry · March 15, 2015 An RF ion-funnel technique has been developed to extract ions from a high-pressure (10 bar) noble-gas environment into a vacuum (10-6 mbar). Detailed simulations have been performed and a prototype has been developed for the purpose of extracting 136Ba ion ... Full text Cite

Spectroscopy of Ba and Ba+ deposits in solid xenon for barium tagging in nEXO

Journal Article Physical Review A - Atomic, Molecular, and Optical Physics · February 10, 2015 Progress on a method of barium tagging for the nEXO double beta decay experiment is reported. Absorption and emission spectra for deposits of barium atoms and ions in solid xenon matrices are presented. Excitation spectra for prominent emission lines, temp ... Full text Cite

A cooler Penning trap for the TITAN mass measurement facility

Conference AIP Conference Proceedings · January 1, 2015 The TITAN facility at TRIUMF makes use of highly charged ions, charge-bred in an electron beam ion trap, to carry out accurate mass measurements on radioactive isotopes. We report on our progress to develop a cooler Penning trap, CPET, which aims at reduci ... Full text Cite

Progress at the TITAN-EBIT

Conference AIP Conference Proceedings · January 1, 2015 Precision mass measurements of short-lived isotopes provide insight into a wide array of physics, including nuclear structure, nucleosynthesis, and tests of the Standard Model. The precision of Penning trap mass spectrometry (PTMS) measurements is limited ... Full text Cite

Direct observation of an isomeric state in ⁹⁸Rb and nuclear properties of exotic rubidium isotopes measured by laser spectroscopy

Journal Article European Physical Journal A · January 1, 2015 Fast-beam collinear laser spectroscopy experiments on rubidium have been performed at the ISAC radioactive ion beam facility at TRIUMF. Most recently, the neutron-rich 98Rb isotope has been studied for the investigation of shape coexistence. Two long-lived ... Full text Cite

An apparatus to manipulate and identify individual Ba ions from bulk liquid Xe.

Journal Article The Review of scientific instruments · September 2014 We describe a system to transport and identify barium ions produced in liquid xenon, as part of R&D towards the second phase of a double beta decay experiment, nEXO. The goal is to identify the Ba ion resulting from an extremely rare nuclear decay of the i ... Full text Cite

In-trap spectroscopy of charge-bred radioactive ions

Journal Article Physical Review Letters · August 21, 2014 In this Letter, we introduce the concept of in-trap nuclear decay spectroscopy of highly charged radioactive ions and describe its successful application as a novel spectroscopic tool. This is demonstrated by a measurement of the decay properties of radioa ... Full text Cite

Breakdown of the isobaric multiplet mass equation for the a=20 and 21 multiplets

Journal Article Physical Review Letters · August 19, 2014 Using the Penning trap mass spectrometer TITAN, we performed the first direct mass measurements of Mg20,21, isotopes that are the most proton-rich members of the A=20 and A=21 isospin multiplets. These measurements were possible through the use of a unique ... Full text Cite

Precision QEC-value measurement of Mg 23 for testing the Cabibbo-Kobayashi-Maskawa matrix unitarity

Journal Article Physical Review C - Nuclear Physics · July 11, 2014 We report a new direct measurement of the transition energy QEC of the Mg23 β+ decay, using the TITAN Penning-trap mass spectrometer. This value is found to agree with the latest atomic mass evaluation while being four times more precise. The increase in p ... Full text Cite

Precision Penning-trap measurement to investigate the role of the Cr 51 (e-,νe) v 51 Q value in the gallium anomaly

Journal Article Physical Review C - Nuclear Physics · April 18, 2014 A direct Q-value measurement has been made at TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN) for the Cr51(e-,νe)V51 reaction. This electron capture (EC) reaction was used in calibration measurements at the solar neutrino experiments SAGE and GALL ... Full text Cite

New determination of double- β -Decay properties in 48Ca: High-precision Qββ -Value measurement and improved nuclear matrix element calculations

Journal Article Physical Review C - Nuclear Physics · April 9, 2014 We report a direct measurement of the Qββ value of the neutrinoless double-β-decay candidate 48Ca at the TITAN Penning-trap mass spectrometer, with the result that Qββ=4267.98(32)keV. We measured the masses of both the mother and daughter nuclides, and in ... Full text Cite

ISAC overview

Chapter · January 1, 2014 TRIUMF operates the rare ion beam facility ISAC, which provides intense beams of short lived isotopes in the energy range from 0.15 to 5 A MeV for A < 30 to a full suite of world class experimental apparatus, enabling a forefront research program focused o ... Full text Cite

The experimental facilities at ISAC

Chapter · January 1, 2014 The ISAC accelerator facility provides rare isotope beams in three different areas at low (20-60 keV), medium-high (up to 1.8 AMeV) or higher energies (up to 16 AMeV, depending on the mass-to-charge ratio of the isotopes). There is a corresponding suite of ... Full text Cite

ARIEL overview

Chapter · January 1, 2014 The Advanced Rare Isotope Laboratory (ARIEL) will expand the scientific capabilities of TRIUMF’s rare isotope program by providing more exotic isotope species with very high intensities and by adding two production targets that will provide beams in parall ... Full text Cite

Electron-capture branching ratio measurements of odd-odd intermediate nuclei in double-beta decay at the TITAN facility

Chapter · January 1, 2014 A novel technique to measure electron-capture branching ratios is being introduced, where the TITAN ion traps and the ISAC radioactive beam facility at TRIUMF are the central components. The technique will be applied to the intermediate odd-odd nuclei in d ... Full text Cite

ISAC and ARIEL: The TRIUMF radioactive beam facilities and the scientific program

Book · January 1, 2014 The TRIUMF Isotope Separator and Accelerator (ISAC) facility uses the isotope separation on-line (ISOL) technique to produce rare-isotope beams (RIB). The ISOL system consists of a primary production beam, a target/ion source, a mass separator, and beam tr ... Full text Cite

TITAN: An ion trap facility for on-line mass measurement experiments

Chapter · January 1, 2014 Precision determinations of ground state or even isomeric state masses reveal fingerprints of nuclear structure. In particular, at the limits of existence for very neutron-rich or -deficient isotopes, one can extract detailed information about nuclear stru ... Full text Cite

Precision mass spectrometry of highly charged ions with TITAN: Status and outlook

Journal Article Hyperfine Interactions · January 1, 2014 High-precision and accurate atomic mass measurements are vital for the description of nuclear structure, investigations of nuclear astrophysical processes, and tests of fundamental symmetries. We report on mass measurements of short-lived highly charged io ... Full text Cite

TITAN: An ion trap for accurate mass measurements of ms-half-life nuclides

Journal Article Applied Physics B: Lasers and Optics · January 1, 2014 The introduction of Paul traps, in particular linear radio-frequency quadrupoles in the early 2000s, has revolutionized the use of ion traps for probing the properties of radioactive nuclides. It opened the path to trapping all available nuclides, independ ... Full text Cite

ARIEL overview

Journal Article Hyperfine Interactions · January 1, 2014 The Advanced Rare Isotope Laboratory (ARIEL) will expand the scientific capabilities of TRIUMF's rare isotope program by providing more exotic isotope species with very high intensities and by adding two production targets that will provide beams in parall ... Full text Cite

ISAC overview

Journal Article Hyperfine Interactions · January 1, 2014 TRIUMF operates the rare ion beam facility ISAC, which provides intense beams of short lived isotopes in the energy range from 0.15 to 5 A MeV for A < 30 to a full suite of world class experimental apparatus, enabling a forefront research program focused o ... Full text Cite

TITAN: An ion trap facility for on-line mass measurement experiments

Journal Article Hyperfine Interactions · January 1, 2014 Precision determinations of ground state or even isomeric state masses reveal fingerprints of nuclear structure. In particular, at the limits of existence for very neutron-rich or -deficient isotopes, one can extract detailed information about nuclear stru ... Full text Cite

The experimental facilities at ISAC

Journal Article Hyperfine Interactions · January 1, 2014 The ISAC accelerator facility provides rare isotope beams in three different areas at low (20-60 keV), medium-high (up to 1.8 AMeV) or higher energies (up to 16 AMeV, depending on the mass-to-charge ratio of the isotopes). There is a corresponding suite of ... Full text Cite

Electron-capture branching ratio measurements of odd-odd intermediate nuclei in double-beta decay at the TITAN facility

Journal Article Hyperfine Interactions · January 1, 2014 A novel technique to measure electron-capture branching ratios is being introduced, where the TITAN ion traps and the ISAC radioactive beam facility at TRIUMF are the central components. The technique will be applied to the intermediate odd-odd nuclei in d ... Full text Cite

Precision mass measurements at TITAN with radioactive ions

Journal Article Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · December 15, 2013 Measurements of the atomic mass further our understanding in many disciplines from metrology to physics beyond the standard model. The accuracy and precision of Penning trap mass spectrometry have been well demonstrated at TITAN, including measurements of ... Full text Cite

Charge breeding rare isotopes for high precision mass measurements: Challenges and opportunities

Conference Physica Scripta · December 4, 2013 Ion charge breeding for Penning-trap mass spectrometry has been established as providing a precision increase that scales linearly with the charge state of the ion. Fast and efficient charge breeding is a precondition for the application of this approach t ... Full text Cite

Cooling of highly-charged, short-lived ions for precision mass spectrometry at TRIUMF's Ion Trap for Atomic and Nuclear Science

Conference Physica Scripta · December 4, 2013 At TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN), masses of short-lived nuclides are measured accurately and precisely using Penning trap mass spectrometry. The achievable precision is primarily limited by the radioactive lifetime of the nuclide ... Full text Cite

Evidence for the extinction of the N=20 neutron-shell closure for 32Mg from direct mass measurements

Journal Article Physical Review C - Nuclear Physics · November 18, 2013 The "island of inversion" around 32Mg is one of the most important paradigms for studying the disappearance of the stabilizing "magicity" of a shell closure. We present the first Penning-trap mass measurements of the exotic nuclides 29-31Na and 30-34Mg, wh ... Full text Cite

Mass measurements of singly and highly charged radioactive ions at TITAN: A new QEC-value measurement of ¹⁰C

Journal Article Annalen der Physik · July 1, 2013 Superallowed β-decay strengths or corrected Ft values provide some of the most stringent limits for physics beyond the standard three-quark model. For this reason, the QEC-value 10C has been measured and found to be 3468.31(51) keV with the TITAN Penning t ... Full text Cite

Penning-trap Q-value determination of the Ga71(ν,e-)Ge71 reaction using threshold charge breeding of on-line produced isotopes

Journal Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · May 24, 2013 We present a first direct Q-value measurement of the Ga71(ν,e-)Ge71 reaction using the TITAN mass-measurement facility at ISAC/TRIUMF. The measurements were performed in a Penning trap on neon-like 71Ga21+ and 71Ge22+ using isobar separation of the on-line ... Full text Cite

Nobel symposium 152: Physics with radioactive beams

Conference Physica Scripta T · April 23, 2013 Cite

Impact of Precision Mass Measurements on Nuclear Physics and Astrophysics

Journal Article Nuclear Physics News · April 1, 2013 Among all nuclear ground-state properties, atomic masses are highly specific for each particular combination of neutron and proton number, N and Z, respectively. The data obtained through mass measurements provide details of the nuclear interaction and thu ... Full text Cite

Trapped-ion decay spectroscopy towards the determination of ground-state components of double-beta decay matrix elements

Journal Article European Physical Journal A · January 1, 2013 A new technique has been developed at the TRIUMF's TITAN facility to perform in-trap decay spectroscopy. The aim of this technique is to eventually measure weak electron capture branching ratios (ECBRs) and by this to consequently determine GT matrix eleme ... Full text Cite

Advances in precision, resolution, and separation techniques with radioactive, highly charged ions for Penning trap mass measurements

Journal Article International Journal of Mass Spectrometry · January 1, 2013 Highly charged ions (HCI) have recently been introduced to the mass spectrometry of short-lived nuclides with Penning traps. In comparison to singly charged ions, HCI enable a gain in achievable experimental precision by a factor identical to the charge st ... Full text Cite

Precision atomic physics techniques for nuclear physics with radioactive beams

Journal Article Physica Scripta · January 1, 2013 Atomic physics techniques for the determination of ground-state properties of radioactive isotopes are very sensitive and provide accurate masses, binding energies, Q-values, charge radii, spins and electromagnetic moments. Many fields in nuclear physics b ... Full text Cite

New precision mass measurements of neutron-rich calcium and potassium isotopes and three-nucleon forces

Journal Article Physical Review Letters · July 20, 2012 We present precision Penning trap mass measurements of neutron-rich calcium and potassium isotopes in the vicinity of neutron number N=32. Using the TITAN system, the mass of K51 was measured for the first time, and the precision of the Ca51,52 mass values ... Full text Cite

Penning-trap mass spectrometry of highly charged, neutron-rich Rb and Sr isotopes in the vicinity of A≈100

Journal Article Physical Review C - Nuclear Physics · June 7, 2012 The neutron-rich mass region around A≈100 presents challenges for modeling the astrophysical r process because of rapid shape transitions. We report on mass measurements using the TITAN Penning trap at TRIUMF-ISAC to attain more reliable theoretical predic ... Full text Cite

TITAN's digital RFQ ion beam cooler and buncher, operation and performance

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · June 1, 2012 We present a description of the Radio Frequency Quadrupole (RFQ) ion trap built as part of the TITAN facility. It consists of a gas-filled, segmented, linear Paul trap and is the first stage of the TITAN setup with the purpose of cooling and bunching radio ... Full text Cite

Elucidation of the anomalous A=9 isospin quartet behavior

Journal Article Physical Review Letters · May 23, 2012 Recent high-precision mass measurements of Li9 and Be9, performed with the TITAN Penning trap at the TRIUMF ISAC facility, are analyzed in light of state-of-the-art shell model calculations. We find an explanation for the anomalous isobaric mass multiplet ... Full text Cite

Highly charged ions in Penning traps: A new tool for resolving low-lying isomeric states

Journal Article Physical Review C - Nuclear Physics · April 12, 2012 The use of highly charged ions increases the precision and resolving power, in particular for short-lived species produced at on-line radio-isotope beam facilities, achievable with Penning trap mass spectrometers. This increase in resolving power provides ... Full text Cite

Penning-trap mass measurements of the neutron-rich K and Ca isotopes: Resurgence of the N=28 shell strength

Journal Article Physical Review C - Nuclear Physics · February 22, 2012 We present Penning-trap mass measurements of neutron-rich 44 ,47-50K and 49,50Ca isotopes carried out at the TITAN facility at TRIUMF-ISAC. The 44K mass measurement was performed with a charge-bred 4+ ion utilizing the TITAN electron beam ion trap and agre ... Full text Cite

First direct mass measurement of the two-neutron halo nucleus He6 and improved mass for the four-neutron halo He8

Journal Article Physical Review Letters · January 31, 2012 The first direct mass measurement of He6 has been performed with the TITAN Penning trap mass spectrometer at the ISAC facility. In addition, the mass of He8 was determined with improved precision over our previous measurement. The obtained masses are m(He6 ... Full text Cite

Verifying the accuracy of the TITAN Penning-trap mass spectrometer

Journal Article International Journal of Mass Spectrometry · January 15, 2012 TITAN (TRIUMF's Ion Traps for Atomic and Nuclear science) is an online facility designed to carry out high-precision mass measurements on singly and highly charged radioactive ions. The TITAN Penning trap has been built and optimized in order to perform su ... Full text Cite

Spectroscopic studies of the charge breeding process in high current electron beam ion traps

Conference Journal of Physics: Conference Series · January 1, 2012 Electron beam ion traps (EBITs) are a new tool for charge breeding of rare isotope beams. The ionization efficiency of a new high current EBIT recently built at the MPIK was investigated spectroscopically during its commissioning phase. ... Full text Cite

The on-line charge breeding program at TRIUMF-s Ion Trap for Atomic and Nuclear Science for precision mass measurements

Journal Article Review of Scientific Instruments · January 1, 2012 TRIUMF-s Ion Trap for Atomic and Nuclear science (TITAN) constitutes the only high precision mass measurement setup coupled to a rare isotope facility capable of increasing the charge state of short-lived nuclides prior to the actual mass determination in ... Full text Cite

A large Bradbury Nielsen ion gate with flexible wire spacing based on photo-etched stainless steel grids and its characterization applying symmetric and asymmetric potentials

Journal Article International Journal of Mass Spectrometry · January 1, 2012 Bradbury Nielsen gates are well known devices used to switch ion beams and are typically applied in mass or mobility spectrometers for separating beam constituents by their different flight or drift times. A Bradbury Nielsen gate consists of two interleave ... Full text Cite

First Use of high charge states for mass measurements of short-lived nuclides in a penning trap

Journal Article Physical Review Letters · December 29, 2011 Penning trap mass measurements of short-lived nuclides have been performed for the first time with highly charged ions, using the TITAN facility at TRIUMF. Compared to singly charged ions, this provides an improvement in experimental precision that scales ... Full text Cite

First Experimental Determination of the Charge Radius of Rb74 and Its Application in Tests of the Unitarity of the Cabibbo-Kobayashi-Maskawa Matrix

Journal Article Physical Review Letters · November 18, 2011 Collinear-laser spectroscopy with the bunched-beams technique was used for the study of neutron deficient Rb isotopes, out to Rb74 (N=Z=37) at TRIUMF. The measured hyperfine coupling constants of Rb76,78m were in agreement with literature values. The nucle ... Full text Cite

Collinear laser spectroscopy with reverse-extracted bunched beams at TRIUMF

Journal Article Hyperfine Interactions · July 1, 2011 Collinear laser spectroscopy with reverse-extracted cooled bunched beams was performed at TRIUMF with radioactive ion beams. Surface-ionized 78,78mRb ions were injected into TITAN's cooler-buncher, and reverse-extracted to the laser beam line. There they w ... Full text Cite

Cooling of short-lived, radioactive, highly charged ions with the TITAN cooler Penning trap

Journal Article Hyperfine Interactions · July 1, 2011 TITAN is an on-line facility dedicated to precision experiments with short-lived radioactive isotopes, in particular mass measurements. The achievable resolution on mass measurement, which depends on the excitation time, is limited by the half life of the ... Full text Cite

Status of the EBIT in the ReA3 reaccelerator at NSCL

Journal Article Hyperfine Interactions · July 1, 2011 At the NSCL a reaccelerator with design end energy of 3 MeV/u for 238U, called ReA3, is approaching the end of construction. ReA3 will be coupled to a gas stopper at the NSCL fragmentation facility to provide rare-isotope beams of nuclides not available at ... Full text Cite

Isotope-shift measurements of stable and short-lived lithium isotopes for nuclear-charge-radii determination

Journal Article Physical Review A - Atomic, Molecular, and Optical Physics · January 31, 2011 Changes in the mean square nuclear charge radii along the lithium isotopic chain were determined using a combination of precise isotope shift measurements and theoretical atomic structure calculations. Nuclear charge radii of light elements are of high int ... Full text Cite

A cooler Penning trap for the TITAN on-line trapping facility

Conference Journal of Physics: Conference Series · January 1, 2011 The TITAN on-line ion trapping facility at TRIUMF is dedicated to precision experiments with short-lived radioactive isotopes, among them mass measurements. A new approach is to breed the ions into high charge states using an electron-beam ion trap. To cou ... Full text Cite

Design of a β-detector for TITAN-EC and the first electron-capture branching ratio measurement in a Penning trap

Conference Journal of Physics: Conference Series · January 1, 2011 At TRIUMF's ion trap for atomic and nuclear science (TITAN) a new experimental technique is being developed to measure electron-capture branching ratios of intermediate nuclei in double-β decays. The key feature of this novel technique is the use of an ope ... Full text Cite

Precision mass measurements of neutron halo nuclei using the TITAN Penning trap

Journal Article Hyperfine Interactions · January 1, 2011 Precise atomic mass determinations play a key role in various fields of physics, including nuclear physics, testing of fundamental symmetries and constants and atomic physics. Recently, the TITAN Penning trap measured the masses of several neutron halos. T ... Full text Cite

In-trap decay spectroscopy for 2νββ decay experiments

Journal Article Hyperfine Interactions · January 1, 2011 Knowledge of 2νββ nuclear matrix elements is essential to probe the theoretical framework of 0νββ decays. At TITAN, TRIUMF's Ion Trap for Atomic and Nuclear science, a novel technique has been developed to measure electron capture branches of virtual inter ... Full text Cite

The TITAN EBIT charge breeder for mass measurements on highly charged short-lived isotopes - First online operation

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · December 1, 2010 TITAN (TRIUMF's Ion Traps for Atomic and Nuclear science) is a novel online facility for high-precision mass measurements on short-lived isotopes. TITAN is the only such facility that employs an Electron-Beam Ion Trap (EBIT) charge-state breeder to produce ... Full text Cite

EBIS/T charge breeding for intense rare isotope beams at MSU

Conference Journal of Instrumentation · October 1, 2010 Experiments with reaccelerated beams are an essential component of the science program of existing and future rare isotope beam facilities. NSCL is currently constructing ReA3, a reaccelerator for rare isotopes that have been produced by projectile fragmen ... Full text Cite

Titan-ebit - Charge breeding of radioactive isotopes for high precision mass measurements

Journal Article Journal of Instrumentation · August 1, 2010 TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN) is a multi-ion trap facility with the goal of high precision mass measurements of radio-nuclides. TITAN is coupled to the ISAC on-line facility at TRIUMF, Vancouver, Canada, and consists of a Radio-F ... Full text Cite

MATS and LaSpec: High-precision experiments using ion traps and lasers at FAIR

Journal Article European Physical Journal: Special Topics · July 16, 2010 Nuclear ground state properties including mass, charge radii, spins and moments can be determined by applying atomic physics techniques such as Penning-trap based mass spectrometry and laser spectroscopy. The MATS and LaSpec setups at the low-energy beamli ... Full text Cite

The NSCL electron beam ion trap for the reacceleration of rare isotopes coming to life: First extraction tests with a high-current electron gun

Conference Review of Scientific Instruments · March 16, 2010 NSCL is currently constructing the ReA3 reaccelerator, which will accelerate rare isotopes obtained from gas stopping of fast-fragment beams to energies of up to 3 MeV/u for uranium and higher for lighter ions. A high-current charge breeder, based on an el ... Full text Cite

Precision ground state mass of Be12 and an isobaric multiplet mass equation (IMME) extrapolation for 2⁺ and 02+ states in the T=2, A=12 multiplet

Journal Article Physical Review C - Nuclear Physics · February 17, 2010 We report the mass measurement of the short-lived Be12 nuclide (T1/2=21.5 ms) performed using the Penning trap mass spectrometer TITAN at TRIUMF. Our mass excess value of 25 078.0(2.1) keV is in agreement with previous measurements, but is a factor of 7 mo ... Full text Cite

Report on recent activities at the TITAN mass spectrometer at ISAC/TRIUMF

Journal Article Hyperfine Interactions · February 1, 2010 The present report gives a short summary of current work at the TITAN mass spectrometer, including on-line mass measurements and systematic studies. A list of recent references for work published is given. © 2010 Springer Science+Business Media B.V. ... Full text Cite

Canada's ISAC Radioactive Beam Facility - At the Nexus of Past and Future Triumphs

Journal Article Nuclear Physics News · January 1, 2010 Full text Cite

In-trap decay spectroscopy of radioactive nuclei at TITAN / TRIMUF for a determination of 2νββ matrix elements

Conference AIP Conference Proceedings · December 1, 2009 To extract the effective neutrino Majorana mass from an observed 0νββ decay, precise knowledge of the involved nuclear matrix element is required. This poses a challenge to nuclear structure models. In particular, calculations based on the proton-neutron Q ... Full text Cite

New mass measurement of Li6 and ppb-level systematic studies of the Penning trap mass spectrometer TITAN

Journal Article Physical Review C - Nuclear Physics · October 15, 2009 The frequency ratio of Li6 to Li7 was measured using the TITAN Penning trap mass spectrometer. This measurement resolves a 16-ppb discrepancy between the Li6 mass of 6.015 122 795(16) u from the Atomic Mass Evaluation 2003 (AME03), which is based on a meas ... Full text Cite

High-precision Penning trap mass measurements of ^9,10Be and the one-neutron halo nuclide ¹¹Be

Journal Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · May 11, 2009 Penning trap mass measurements of 9Be, 10Be (t1 / 2 = 1.51 My), and the one-neutron halo nuclide 11Be (t1 / 2 = 13.8 s) have been performed using TITAN at TRIUMF. The resulting 11Be mass excess (ME = 20 177.60 (58) keV) is in agreement with the current Ato ... Full text Cite

First penning-trap mass measurement of the exotic halo nucleus Li11

Journal Article Physical Review Letters · November 14, 2008 In this Letter, we report a new mass for Li11 using the trapping experiment TITAN at TRIUMF's ISAC facility. This is by far the shortest-lived nuclide, t1/2=8.8ms, for which a mass measurement has ever been performed with a Penning trap. Combined with our ... Full text Cite

An electron beam ion trap for the NSCL reaccelerator

Journal Article Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · October 1, 2008 The reacceleration of stopped fast-fragment beams or low-energy ISOL beams to the energy range of 0.3-12 MeV/nucleon allows for experiments such as low-energy Coulomb excitation and transfer reaction studies and for the precise study of astrophysical react ... Full text Cite

Electron capture branching ratio measurements in an ion trap for double beta decay experiments at TITAN

Journal Article Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · October 1, 2008 Double beta decay (ββ) is a nuclear decay mode expected to appear in at least two varieties, the double-neutrino (2ν) and the zero-neutrino (0ν) mode. The 0νββ-decay is of particular interest as it requires the neutrino to be a Majorana particle. The searc ... Full text Cite

Direct mass measurement of the four-neutron halo nuclide He8

Journal Article Physical Review Letters · July 1, 2008 A high-precision Penning trap mass measurement of the exotic He8 nuclide (T1/2=119ms) has been carried out resulting in a reduction of the uncertainty of the halo binding energy by over an order of magnitude. The new mass, determined with a relative uncert ... Full text Cite

A high-current electron beam ion trap as a charge breeder for the reacceleration of rare isotopes at the NSCL (invited)

Journal Article Review of Scientific Instruments · March 7, 2008 Reacceleration of low-energy rare isotope beams available from gas stopping of fast-fragment beams or from an ISOL target station to energies in the range of 0.3-12 MeV /nucleon is needed for experiments such as low-energy Coulomb excitation and transfer r ... Full text Cite

Proposal for A 1/2 MW electron linac for rare isotope and materials science

Conference EPAC 2008 - Contributions to the Proceedings · January 1, 2008 TRIUMF, in collaboration with university partners, proposes to construct a megawatt-class electron linear accelerator [1](e-linac) as a driver for U() 8,f) with rates up to 1013-1014 fissions/sec, and for 9Be(γ,p)8 Li for materials science. The emphasis wo ... Cite

A high frequency MOSFET driver for the TITAN facility at TRIUMF

Conference Digest of Technical Papers-IEEE International Pulsed Power Conference · December 1, 2007 TRIUMF's Ion Trap for Atomic and Nuclear Science (TITAN) Radio Frequency Quadrupole (RFQ) Beam Cooler is a device cools and collects short-lived isotopes, with half-lives as short as 10 ms, created by an Isotope Separator and Accelerator (ISAC). An RF squa ... Full text Cite

Planning for the future in nuclear physics in Canada and globally

Journal Article International Journal of Phytoremediation · January 1, 2007 The Canadian community of nuclear and particle physicists has just published its vision for the next decade, outlining the present strengths of and the future objectives for the national research program (“Perspective on Subatomic Physics in Canada for 200 ... Full text Cite

Electron capture branching ratios for the odd-odd intermediate nuclei in double-beta decay using the TITAN ion trap facility

Journal Article Canadian Journal of Physics · January 1, 2007 We suggest a measurement of the electron capture (EC) branching ratios for the odd-odd intermediate nuclei in double-beta (β-β - ) decay using the new ion trap facility TITAN at the TRIUMF radioactive beam facility. The EC branching ratios are important fo ... Full text Cite

First tests of the TITAN digital RFQ beam cooler and buncher

Journal Article Hyperfine Interactions · November 1, 2006 A digital RFQ beam cooler and buncher has been developed as part of the TITAN facility. Following a brief review of the theory of ion motion in such a trap, a description of the RFQ and the experimental setup used for initial testing of the trap is given. ... Full text Cite

A cooler ion trap for the TITAN on-line trapping facility at TRIUMF

Journal Article Hyperfine Interactions · November 1, 2006 We present simulations of electron and proton cooling of highly charged ions in a Penning trap, including the potentially detrimental effects of radiative, dielectronic, and three-body recombination in electron cooling. We show a preliminary design for a c ... Full text Cite

The TITAN mass measurement facility at TRIUMF-ISAC

Journal Article Hyperfine Interactions · November 1, 2006 The TITAN facility at TRIUMF-ISAC will use four ion traps with the primary goal of determining nuclear masses with high precision, particularly for short lived isotopes with lifetimes down to approximately 10 ms. The design value for the accuracy of the ma ... Full text Cite

A high-current electron beam ion trap as an on-line charge breeder for the high precision mass measurement TITAN experiment

Journal Article Hyperfine Interactions · November 1, 2006 The precision of atomic mass measurements in a Penning trap is directly proportional to the charge state q of the ion and, hence, can be increased by using highly charged ions (HCI). For this reason, charge breeding with an electron beam ion trap (EBIT) is ... Full text Cite

Hyperfine Interactions: Foreword

Journal Article Hyperfine Interactions · September 1, 2006 Full text Cite

Nuclear charge radius of ¹¹Li

Conference Hyperfine Interactions · July 1, 2006 We have determined the nuclear charge radius of 11Li by high-precision laser spectroscopy. The experiment was performed at the TRIUMF-ISAC facility where the 7Li-11Li isotope shift (IS) was measured in the 2s → 3s electronic transition using Doppler-free t ... Full text Cite

Mass measurements on highly charged radioactive ions, a new approach to high precision with TITAN

Journal Article International Journal of Mass Spectrometry · April 1, 2006 TITAN (TRIUMF's Ion Trap for Atomic and Nuclear science) is a system of multiple ion traps installed at the radioactive ion beam facility ISAC. The uniqueness of the system lies in the combination of different kinds of ion traps nowhere else available, and ... Full text Cite

Nuclear charge radii of Li9,11: The influence of halo neutrons

Journal Article Physical Review Letters · January 27, 2006 The nuclear charge radius of Li11 has been determined for the first time by high-precision laser spectroscopy. On-line measurements at TRIUMF-ISAC yielded a Li7-Li11 isotope shift (IS) of 25101.23(13) MHz for the Doppler-free 2s S1/22→3s S1/22 transition. ... Full text Cite

TITAN project status report and a proposal for a new cooling method of highly charged ions

Conference European Physical Journal A · September 1, 2005 The TITAN facility for precision mass measurements of short-lived isotopes is currently being constructed at the ISAC radioactive beam facility at TRIUMF, Vancouver, Canada. Current status and developments in the project are reported. A new method for cool ... Full text Cite

A high-current EBIT for charge-breeding of radionuclides for the TITAN spectrometer

Conference European Physical Journal A · September 1, 2005 The TITAN (Triumf's Ion Trap for Atomic and Nuclear science) Penning trap mass spectrometer will be located at ISAC/TRIUMF in Vancouver, Canada. It is designed for conducting high-precision mass measurements on radionuclides via the determination of the cy ... Full text Cite

Weak interaction symmetries with atom traps

Conference European Physical Journal A · September 1, 2005 Neutral atoms trapped with modern laser cooling techniques offer the promise of improving several broad classes of weak interaction experiments with radioactive isotopes. For nuclear β decay, demonstrated trap techniques include neutrino momentum measureme ... Full text Cite

Scalar interaction limits from the β-ν correlation of trapped radioactive atoms

Journal Article Physical Review Letters · April 15, 2005 We have set limits on contributions of scalar interactions to nuclear β decay. A magneto-optical trap provides a localized source of atoms suspended in space, so the low-energy recoiling nuclei can freely escape and be detected in coincidence with the β. T ... Full text Cite

Direct mass measurements of neutron-deficient xenon isotopes using the ISOLTRAP mass spectrometer

Journal Article European Physical Journal A · November 1, 2004 The masses of the noble-gas Xe isotopes with 114 ≤ A ≤ 123 have been directly measured for the first time. The experiments were carried out with the ISOLTRAP triple trap spectrometer at the online mass separator ISOLDE/CERN. A mass resolving power of the P ... Full text Cite

The mass of²²Mg

Journal Article Physical Review Letters · October 8, 2004 The mass measurement of 22Mg was performed with the ISOLTRAP Penning trap mass spectrometer at ISOLDE/CERN. It was observed that the measurement on 21Na and 22Mg yield a 21Na(p, γ)22Mg resonance energy into the 5713.9-KeV 2+ of ER=209.7(1.2). A comparative ... Full text Cite

SHIPTRAP is Trapping: A Capture and Storage Device on Its Way Towards a RIB-Facility

Conference Hyperfine Interactions · December 1, 2003 First off-line tests at the ion trap facility SHIPTRAP took place. The facility is being set up to deliver very clean and cooled beams of singly-charged recoil ions (Rare Isotope Beam) produced at the SHIP (Separator for Heavy Ion Production) velocity filt ... Full text Cite

First on-line test of SHIPTRAP

Conference Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · May 1, 2003 The ion trap facility SHIPTRAP is installed behind the separator for heavy ion reaction products (SHIP) at GSI, which is well known for the discovery of new super-heavy elements produced in cold fusion reactions. SHIPTRAP consists out of a gas cell for sto ... Full text Cite

The proposed TITAN facility at ISAC for very precise mass measurements on highly charged short-lived isotopes

Conference Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · May 1, 2003 One of the necessary experimental quantities required for the test of unitarity of the fundamental Cabbibo-Kobayashi-Maskawa (CKM) quark mixing matrix can be gained from nuclear beta decay. However, the short-lived beta-decaying nuclei have to be produced ... Full text Cite

Novel search for heavy ν mixing from the β⁺ decay of ^38mK confined in an atom trap

Journal Article Physical Review Letters · January 10, 2003 A magneto-optical trap and the new technique of full neutrino momentum reconstruction were used to account for massive neutrino admixtures in nuclear β decay. It was possible to set the best direct limits on heavy vx admixtures into ve from mvx=0.7-3.6 MeV ... Cite

Novel Search for Heavy [Formula presented] Mixing from the [Formula presented] Decay of [Formula presented] Confined in an Atom Trap

Journal Article Physical Review Letters · January 1, 2003 A new technique, full neutrino momentum reconstruction, is used to set limits on the admixture of heavy neutrinos into the electron neutrino. We measure coincidences between nuclear recoils and positrons from the beta decay of trapped radioactive atoms and ... Full text Cite

Search for new physics in beta-neutrino correlations with the WITCH spectrometer

Journal Article Nuclear Physics A · April 22, 2002 The WITCH (Weak Interaction Trap for CHarged particles) experiment is a retardation spectrometer coupled to a Penning trap and measures the beta-neutrino angular correlation via the shape of the recoil energy spectrom. The present form of the Standard Mode ... Full text Cite

Extension of Penning-trap mass measurements to very short-lived nuclides

Journal Article Nuclear Physics A · April 22, 2002 Mass measurements on 33,34,42,43Ar have been performed at the ISOLTRAP spectrometer. An accuracy of δm ≈ 4 keV has been achieved for all measured isitopes. With 33Ar it is the first time that a nuclide with a half-life shorter than one second has been inve ... Full text Cite

A linear radiofrequency quadrupole ion trap for the cooling and bunching of radioactive ion beams

Journal Article Nuclear Physics A · April 22, 2002 A linear radio-frequency quadrupole ion guide and beam buncher has been installed at the ISOLTRAP mass spectrometry experiment at he ISOLDE facility at CERN. The apparatus is being used as a beam cooling, accumulation, and bunching system. It operates with ... Full text Cite

Direct mass measurements of neutron-deficient xenon isotopes with the ISOLTRAP mass spectrometer

Journal Article Nuclear Physics A · April 22, 2002 The masses of Xe isotopes with 124 ≥ A ≥ 114 have been measured using the ISOLTRAP spectrometer at the on-line mass separator ISOLDE/CERN. A mass resolving power of 500 000 was chosen resulting in an accuracy of δm ≈ 12 keV for all isotopes investigated. C ... Full text Cite

SHIPTRAP - A capture and storage facility for heavy radionuclides at GSI

Journal Article Nuclear Physics A · April 22, 2002 SHIPTRAP will be an ion-trap facility for heavy radionuclides delivered from SHIP. Ion traps are a perfect instrument for precision measurements since the ions can be cooled to an extremely small phase space and can be stored for a very long time. In addit ... Full text Cite

Accurate masses of neutron-deficient nuclides close to Z=82

Journal Article Nuclear Physics A · October 22, 2001 Mass measurements with the Penning-trap mass spectrometer ISOLTRAP at ISOLDE/CERN are extended to nonsurface ionizable species using newly developed ion-beam bunching devices. Masses of 179-197Hg, 196,198Pb, 197Bi, 198Po and 203At were determined with an a ... Full text Cite

Breakdown of the isobaric multiplet mass equation at A = 33, T = 3/2

Journal Article Physical Review Letters · October 1, 2001 The mass of charged particles with a half-life in the order of 100 ms was measured using a Penning trap. The accuracy remained comparable to Penning trap mass measurements of longer-lived species. This was made possible by the development of a new efficien ... Full text Cite

A linear radiofrequency ion trap for accumulation, bunching, and emittance improvement of radioactive ion beams

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · August 11, 2001 An ion beam cooler and buncher has been developed for the manipulation of radioactive ion beams. The gas-filled linear radiofrequency ion trap system is installed at the Penning trap mass spectrometer ISOLTRAP at ISOLDE/CERN. Its purpose is to accumulate t ... Full text Cite

Improvement of the Applicability, Efficiency, andPrecision of the Penning Trap Mass Spectrometer ISOLTRAP

Journal Article Hyperfine Interactions · January 28, 2001 With the Penning trap mass spectrometer ISOLTRAP, close to 200 nuclides have already been investigated and their masses determined with a typical relative precision of δm/m=10−7. Recently, ISOLTRAP's beam preparation system was replaced by an RF ... Full text Cite

Mass Measurements on Short-Lived Nuclides with ISOLTRAP

Journal Article Hyperfine Interactions · January 28, 2001 Penning trap mass spectrometry has reached a state that allows its application to very short-lived nuclides available from various sources of radioactive beams. Mass values with outstanding accuracy are achieved even far from stability. This paper illustra ... Full text Cite

Status of the SHIPTRAP Project: A Capture and Storage Facility for Heavy Radionuclides fromSHIP

Journal Article Hyperfine Interactions · January 28, 2001 The ion trap facility SHIPTRAP is being set up to deliver very clean and cool beams of singly-charged recoil ions produced at the SHIP velocity filter at GSI Darmstadt. SHIPTRAP consists of a gas cell for stopping and thermalizing high-energy recoil ions f ... Full text Cite

Towards Shorter-Lived Nuclides in ISOLTRAP Mass Measurements

Journal Article Hyperfine Interactions · January 28, 2001 Recently, the applicability of Penning trap mass spectrometry has been extended to nuclides with a half-life of less than one second. The mass of 33Ar (T1/2=174 ms) was measured using the ISOLTRAP spectrometer with an accuracy of 4.2 ... Full text Cite

HITRAP: A Facility for Experiments with Trapped Highly Charged Ions

Journal Article Hyperfine Interactions · January 28, 2001 HITRAP is a planned ion trap facility for capturing and cooling of highly charged ions produced at GSI in the heavy-ion complex of the UNILAC-SIS accelerators and the ESR storage ring. In this facility heavy highly charged ions up to uranium will be availa ... Full text Cite

Mass Measurements of ^{114–124,130}Xe with the ISOLTRAP Penning Trap Spectrometer

Journal Article Hyperfine Interactions · January 28, 2001 The masses of the xenon isotopes with 114≤A≤123 were directly measured for the first time. The experiments were carried out at the ISOLTRAP triple trap spectrometer at the on-line mass separator ISOLDE/CERN. A mass resolving power of the Penning trap spect ... Full text Cite

Accurate Mass Determination of Neutron-Deficient Nuclides Close to Z=82 with ISOLTRAP

Journal Article Hyperfine Interactions · January 28, 2001 The recent implementation of gas-filled radiofrequency traps for efficient ion beam bunching extended the applicability of the Penning trap mass spectrometer ISOLTRAP/CERN to non-surface ionizable species. In a first series of successful runs the masses of ... Full text Cite

A physics case for SHIPTRAP: Measuring the masses of transuranium Elements

Conference Hyperfine Interactions · January 1, 2001 SHIPTRAP will allow direct measurement of masses of transuranium nuclides. The method of choice is a Penning trap spectrometer coupled to the SHIP (Separator for Heavy Ion Products) facility at GSI, Darmstadt. In this paper the impact of the SHIPTRAP facil ... Full text Cite

Mass measurements of ^{114-124, 130}Xe with the ISOLTRAP penning trap spectrometer

Conference Hyperfine Interactions · January 1, 2001 The masses of the xenon isotopes with 114 ≤ A ≤ 123 were directly measured for the first time. The experiments were carried out at the Isoltrap triple trap spectrometer at the on-line mass separator Isolde/cern. A mass resolving power of the Penning trap s ... Full text Cite

Mass measurements on short-lived nuclides with ISOLTRAP

Conference Hyperfine Interactions · January 1, 2001 Penning trap mass spectrometry has reached a state that allows its application to very short-lived nuclides available from various sources of radioactive beams. Mass values with outstanding accuracy are achieved even far from stability. This paper illustra ... Full text Cite

Improvement of the applicability, efficiency, and precision of the penning trap mass spectrometer ISOLTRAP

Conference Hyperfine Interactions · January 1, 2001 With the Penning trap mass spectrometer ISOLTRAP, close to 200 nuclides have already been investigated and their masses determined with a typical relative precision of δm/m = 10-7. Recently, ISOLTRAP's beam preparation system was replaced by an RFQ ion bea ... Full text Cite

Towards shorter-lived nuclides in ISOLTRAP mass measurements

Conference Hyperfine Interactions · January 1, 2001 Recently, the applicability of Penning trap mass spectrometry has been extended to nuclides with a half-life of less than one second. The mass of 33Ar (T1/2 = 174 ms) was measured using the ISOLTRAP spectrometer with an accuracy of 4.2 keV. This measuremen ... Full text Cite

HITRAP: A facility for experiments with trapped highly charged ions

Conference Hyperfine Interactions · January 1, 2001 HITRAP is a planned ion trap facility for capturing and cooling of highly charged ions produced at GSI in the heavy-ion complex of the UNILAC-SIS accelerators and the ESR storage ring. In this facility heavy highly charged ions up to uranium will be availa ... Full text Cite

Status of the SHIPTRAP project: A capture and storage facility for heavy radionuclides from SHIP

Conference Hyperfine Interactions · January 1, 2001 The ion trap facility SHIPTRAP is being set up to deliver very clean and cool beams of singly-charged recoil ions produced at the SHIP velocity filter at GSI Darmstadt. SHIPTRAP consists of a gas cell for stopping and thermalizing high-energy recoil ions f ... Full text Cite

Stopping, trapping and cooling of radioactive fission fragments in an ion catcher device

Conference Hyperfine Interactions · January 1, 2001 An ion catcher as presented in this contribution is able to create cooled and very clean singly-charged ion pulses out of a 'hot' beam within a very short period of time. Precision measurements on shortlived radioactive nuclides become possible. This contr ... Full text Cite

Accurate mass determination of neutron-deficient nuclides close to Z = 82 with ISOLTRAP

Conference Hyperfine Interactions · January 1, 2001 The recent implementation of gas-filled radiofrequency traps for efficient ion beam bunching extended the applicability of the Penning trap mass spectrometer ISOLTRAP/CERN to non-surface ionizable species. In a first series of successful runs the masses of ... Full text Cite

The SHIPTRAP project: A capture and storage facility at GSI for heavy radionuclides from SHIP

Conference Hyperfine Interactions · December 1, 2000 SHIPTRAP is an ion trap facility which is being set up to deliver very clean and cool beams of singly-charged recoil ions produced at the SHIP velocity filter at GSI Darmstadt. SHIPTRAP consists of a gas cell for stopping and thermalizing high-energy recoi ... Full text Cite

Beta-neutrino correlation experiments on laser trapped ^38mK, ³⁷K

Conference Hyperfine Interactions · December 1, 2000 Laser trapping and cooling techniques are now being applied to the study of nuclear β-decay at several labs. A magneto-optical trap (MOT) provides a localized source of atoms suspended in space, so the low-energy recoiling nuclei can freely escape and be d ... Full text Cite

Beta-decay experiments of neutral atoms in a magneto-optical trap

Journal Article Hyperfine Interactions · December 1, 1998 Magneto optical traps (MOT) allow the cooling and storing of neutral atoms in a volume of a few cubic millimeters by use of laser beams and a magnetic field. Such devices offer new and exciting opportunities for precision measurements of radioactive isotop ... Cite

Magneto-optic trapping of β-decaying ³⁸K^m, ³⁷K from an on-line isotope separator

Journal Article Physical Review Letters · January 1, 1997 A magneto-optic trap (MOT) can provide a well-polarized, backing-free, localized source of radioactive atoms for α-decay experiments. We have trapped approximately 6000 atoms of 38Km (t1/2 = 0.925 s) and 2000 atoms of 37K (1.226 s) produced at the TRIUMF o ... Full text Cite