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Calvin R. Howell

Professor of Physics
Physics
Box 90308, Durham, NC 27708-0308
221 Dfell, Durham, NC 27708

Selected Publications


Observation of Low-Lying Isomeric States in ^{136}Cs: A New Avenue for Dark Matter and Solar Neutrino Detection in Xenon Detectors.

Journal Article Physical review letters · August 2023 We report on new measurements establishing the existence of low-lying isomeric states in ^{136}Cs using γ rays produced in ^{136}Xe(p,n)^{136}Cs reactions. Two states with O(100)  ns lifetimes are placed in the decay sequence of the ^{136}Cs levels that ar ... Full text Cite

Fission product yields from the U 238 (n,f) reaction at En=4.6 MeV

Journal Article Physical Review C · May 1, 2023 We present cumulative fission product yields from the U238(n,f) reaction at an incident energy of 4.6 MeV for fission products with half-lives from less than one second to several hours. We employed direct γ-ray spectroscopy to measure unseparated fission ... Full text Cite

Erratum: Monoenergetic photon-induced fission cross-section ratio measurements for U 235, U 238, and Pu 239 from 9.0 to 17.0 MeV (Physical Review C (2018) 98 (014608) DOI: 10.1103/PhysRevC.98.014608)

Journal Article Physical Review C · March 1, 2023 Background: High-accuracy data are needed to advance microscopic descriptions of the nuclear fission process, to improve the predictive precision of phenomenological models, and for applications in nuclear energy and homeland security. Purpose: The main go ... Full text Cite

Measurement of the S01 neutron-neutron effective range in neutron-deuteron breakup

Journal Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · December 10, 2022 We report the most precise determination of the S01 neutron-neutron effective range parameter (rnn) from neutron-neutron quasifree scattering in neutron-deuteron breakup. The experiment setup utilized a collimated beam of 15.5 MeV neutrons and an array of ... Full text Cite

Proton Compton Scattering from Linearly Polarized Gamma Rays.

Journal Article Physical review letters · April 2022 Differential cross sections for Compton scattering from the proton have been measured at scattering angles of 55°, 90°, and 125° in the laboratory frame using quasimonoenergetic linearly (circularly) polarized photon beams with a weighted mean energy value ... Full text Cite

Development of a rapid-transit system for precision nuclear physics measurements

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · February 11, 2022 A Rapid Belt-driven Irradiated Target Transfer System, named RABITTS, was developed for use at the Triangle Universities Nuclear Laboratory. This system allows for cyclic activation with neutron or photon beams, and measurement of reaction products using γ ... Full text Cite

International Workshop on Next Generation Gamma-Ray Source

Journal Article Journal of Physics G: Nuclear and Particle Physics · December 2, 2021 Link to item Cite

Measurements of Short-Lived Isomers from Photofission as a Method of Active Interrogation for Special Nuclear Materials

Journal Article Physical Review Applied · March 1, 2021 Isomeric fission products, such as 134mTe (T1/2=164 ns) and 136mXe (T1/2=2.95μs), are proposed as a signature of special nuclear materials in active interrogation applications. To test this conjecture, monoenergetic 9, 11, and 13 MeV photons from the HIγS ... Full text Cite

ARUNA: Advancing Science, Educating Scientists, Delivering for Society

Journal Article Nuclear Physics News · January 1, 2021 Full text Cite

Tests and calibrations of nuclear track detectors (CR39) for operation in high neutron flux

Journal Article Physical Review Research · June 3, 2020 The neutron beams produced by the Soreq Applied Research Accelerator Facility (SARAF) operating with the liquid lithium target (LiLiT) present scientific opportunities in nuclear astrophysics. Of interest are measurements (in our setup) of 1.5 to 3.0 MeV a ... Full text Cite

A functional form for liquid scintillator pulse shapes

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · March 1, 2020 Digitization of detector signals enables analysis of the original waveform to extract timing, particle identification, and energy deposition information. Here we present the use of analytical functions based on sigmoids to model and fit such pulse shapes f ... Full text Cite

Neutron-neutron quasifree scattering in neutron-deuteron breakup at 10 MeV

Journal Article Physical Review C · March 1, 2020 New measurements of the neutron-neutron quasifree scattering cross section in neutron-deuteron breakup at an incident neutron energy of 10.0 MeV are reported. The experiment setup was optimized to evaluate the technique for determining the integrated beam- ... Full text Cite

Time Projection Chamber (TPC) detectors for nuclear astrophysics studies with gamma beams

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · February 21, 2020 Gamma-Beams at the HIγS facility in the USA and anticipated at the ELI-NP facility, now constructed in Romania, present unique new opportunities to advance research in nuclear astrophysics; not the least of which is resolving open questions in oxygen forma ... Full text Cite

Low-Energy QCD Research at TUNL

Conference Springer Proceedings in Physics · January 1, 2020 Experiments are underway at the Triangle Universities Nuclear Laboratory (TUNL) that provide data for evaluating calculations based on low-energy QCD theories, e.g., effective field theory formulations of two-nucleon and three-nucleon interactions, chiral- ... Full text Cite

Fission Product Yield Measurements from Neutron-Induced Fission of 235,238 U and 239Pu

Conference EPJ Web of Conferences · 2020 Fission product yields (FPY) are one of the most fundamental quantities that can be measured for a fissioning nucleus and are important for basic and applied nuclear physics. Recent measurements using mono-energetic and pulsed neutron beams generat ... Full text Cite

Fission product yield measurements using monoenergetic photon beams

Journal Article Physical Review C · July 19, 2019 Background: High-accuracy and self-consistent fission product yield (FPY) data are needed to advance microscopic/macroscopic descriptions of the nuclear fission process, to improve the predictive power of phenomenological models, and for applications in nu ... Full text Cite

Measurement of the Se 80 (γ,n) reaction with linearly polarized γ rays

Journal Article Physical Review C · November 30, 2018 This paper reports the results of the first measurements of the differential cross section of the Se80(γ,n)Se79 reaction with a linearly polarized gamma-ray (γ-ray) beam. The cross section was measured at three incident γ-ray beam energies: 15.6, 15.8, and ... Full text Cite

Observation of Low-Lying Isomeric States in ^{136}Cs: A New Avenue for Dark Matter and Solar Neutrino Detection in Xenon Detectors.

Journal Article Physical review letters · August 2023 We report on new measurements establishing the existence of low-lying isomeric states in ^{136}Cs using γ rays produced in ^{136}Xe(p,n)^{136}Cs reactions. Two states with O(100)  ns lifetimes are placed in the decay sequence of the ^{136}Cs levels that ar ... Full text Cite

Fission product yields from the U 238 (n,f) reaction at En=4.6 MeV

Journal Article Physical Review C · May 1, 2023 We present cumulative fission product yields from the U238(n,f) reaction at an incident energy of 4.6 MeV for fission products with half-lives from less than one second to several hours. We employed direct γ-ray spectroscopy to measure unseparated fission ... Full text Cite

Erratum: Monoenergetic photon-induced fission cross-section ratio measurements for U 235, U 238, and Pu 239 from 9.0 to 17.0 MeV (Physical Review C (2018) 98 (014608) DOI: 10.1103/PhysRevC.98.014608)

Journal Article Physical Review C · March 1, 2023 Background: High-accuracy data are needed to advance microscopic descriptions of the nuclear fission process, to improve the predictive precision of phenomenological models, and for applications in nuclear energy and homeland security. Purpose: The main go ... Full text Cite

Measurement of the S01 neutron-neutron effective range in neutron-deuteron breakup

Journal Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · December 10, 2022 We report the most precise determination of the S01 neutron-neutron effective range parameter (rnn) from neutron-neutron quasifree scattering in neutron-deuteron breakup. The experiment setup utilized a collimated beam of 15.5 MeV neutrons and an array of ... Full text Cite

Proton Compton Scattering from Linearly Polarized Gamma Rays.

Journal Article Physical review letters · April 2022 Differential cross sections for Compton scattering from the proton have been measured at scattering angles of 55°, 90°, and 125° in the laboratory frame using quasimonoenergetic linearly (circularly) polarized photon beams with a weighted mean energy value ... Full text Cite

Development of a rapid-transit system for precision nuclear physics measurements

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · February 11, 2022 A Rapid Belt-driven Irradiated Target Transfer System, named RABITTS, was developed for use at the Triangle Universities Nuclear Laboratory. This system allows for cyclic activation with neutron or photon beams, and measurement of reaction products using γ ... Full text Cite

International Workshop on Next Generation Gamma-Ray Source

Journal Article Journal of Physics G: Nuclear and Particle Physics · December 2, 2021 Link to item Cite

Measurements of Short-Lived Isomers from Photofission as a Method of Active Interrogation for Special Nuclear Materials

Journal Article Physical Review Applied · March 1, 2021 Isomeric fission products, such as 134mTe (T1/2=164 ns) and 136mXe (T1/2=2.95μs), are proposed as a signature of special nuclear materials in active interrogation applications. To test this conjecture, monoenergetic 9, 11, and 13 MeV photons from the HIγS ... Full text Cite

ARUNA: Advancing Science, Educating Scientists, Delivering for Society

Journal Article Nuclear Physics News · January 1, 2021 Full text Cite

Tests and calibrations of nuclear track detectors (CR39) for operation in high neutron flux

Journal Article Physical Review Research · June 3, 2020 The neutron beams produced by the Soreq Applied Research Accelerator Facility (SARAF) operating with the liquid lithium target (LiLiT) present scientific opportunities in nuclear astrophysics. Of interest are measurements (in our setup) of 1.5 to 3.0 MeV a ... Full text Cite

A functional form for liquid scintillator pulse shapes

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · March 1, 2020 Digitization of detector signals enables analysis of the original waveform to extract timing, particle identification, and energy deposition information. Here we present the use of analytical functions based on sigmoids to model and fit such pulse shapes f ... Full text Cite

Neutron-neutron quasifree scattering in neutron-deuteron breakup at 10 MeV

Journal Article Physical Review C · March 1, 2020 New measurements of the neutron-neutron quasifree scattering cross section in neutron-deuteron breakup at an incident neutron energy of 10.0 MeV are reported. The experiment setup was optimized to evaluate the technique for determining the integrated beam- ... Full text Cite

Time Projection Chamber (TPC) detectors for nuclear astrophysics studies with gamma beams

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · February 21, 2020 Gamma-Beams at the HIγS facility in the USA and anticipated at the ELI-NP facility, now constructed in Romania, present unique new opportunities to advance research in nuclear astrophysics; not the least of which is resolving open questions in oxygen forma ... Full text Cite

Low-Energy QCD Research at TUNL

Conference Springer Proceedings in Physics · January 1, 2020 Experiments are underway at the Triangle Universities Nuclear Laboratory (TUNL) that provide data for evaluating calculations based on low-energy QCD theories, e.g., effective field theory formulations of two-nucleon and three-nucleon interactions, chiral- ... Full text Cite

Fission Product Yield Measurements from Neutron-Induced Fission of 235,238 U and 239Pu

Conference EPJ Web of Conferences · 2020 Fission product yields (FPY) are one of the most fundamental quantities that can be measured for a fissioning nucleus and are important for basic and applied nuclear physics. Recent measurements using mono-energetic and pulsed neutron beams generat ... Full text Cite

Fission product yield measurements using monoenergetic photon beams

Journal Article Physical Review C · July 19, 2019 Background: High-accuracy and self-consistent fission product yield (FPY) data are needed to advance microscopic/macroscopic descriptions of the nuclear fission process, to improve the predictive power of phenomenological models, and for applications in nu ... Full text Cite

Measurement of the Se 80 (γ,n) reaction with linearly polarized γ rays

Journal Article Physical Review C · November 30, 2018 This paper reports the results of the first measurements of the differential cross section of the Se80(γ,n)Se79 reaction with a linearly polarized gamma-ray (γ-ray) beam. The cross section was measured at three incident γ-ray beam energies: 15.6, 15.8, and ... Full text Cite

The 9th International Workshop on Chiral Dynamics 2018

Journal Article Proceedings of Science · January 1, 2018 Cite

Low-Energy QCD: Few-Nucleon Research at TUNL

Conference Proceedings of Science · January 1, 2018 The main goal of few-nucleon research at the Triangle Universities Nuclear Laboratory (TUNL) is to perform high-precision measurements that contribute to advancing ab-initio calculations and testing nucleon-interaction models. The current focus is on the t ... Cite

White paper on nuclear astrophysics and low-energy nuclear physics, Part 2: Low-energy nuclear physics

Journal Article Progress in Particle and Nuclear Physics · May 1, 2017 Over the last decade, the Low-Energy Nuclear Physics (LENP) and Nuclear Astrophysics (NAP) communities have increasingly organized themselves in order to take a coherent approach to resolving the challenges they face. As a result, there is a high level of ... Full text Cite

Photofission cross-section ratio measurement of 235 U/238 U using monoenergetic photons in the energy range of 9.0–16.6 MeV

Journal Article Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · 2017 Cite

Design of an Experiment to Measure ann Using 3 H (γ, pn) n at HIγS

Conference EPJ Web of Conferences · March 25, 2016 We provide an update on the development of an experiment at TUNL for determining the 1S0 neutron-neutron (nn) scattering length (ann) from differential cross-section measurements of three-body photodisintegration of the triton. The experiment will be condu ... Full text Cite

Monte-Carlo Simulation of 3H(γ, pn) n and 3He(γ, pp) n Experiments at HI γs

Conference EPJ Web of Conferences · March 25, 2016 We are developing an experiment to measure the two and three-body (γ, p) differential cross sections (DCS) for 3H and 3He. These data will be used to determine the 1S0 nn scattering length (ann) and np scattering length (anp) respectively. This paper descr ... Full text Cite

Neutron-neutron quasifree scattering in nd breakup at 10 MeV

Conference EPJ Web of Conferences · March 25, 2016 The neutron-deuteron (nd) breakup reaction provides a rich environment for testing theoretical models of the neutron-neutron (nn) interaction. Current theoretical predictions based on rigorous ab-initio calculations agree well with most experimental data f ... Full text Cite

Few-Nucleon Research at TUNL: Probing Two- and Three-Nucleon Interactions with Neutrons

Conference EPJ Web of Conferences · March 25, 2016 The central goal of few-nucleon research at the Triangle Universities Nuclear Laboratory (TUNL) is to perform measurements that contribute to advancing ab-initio calculations of nuclear structure and reactions. The program aims include evaluating theoretic ... Full text Cite

Status of Theory and Experiment in Hadronic Parity Violation

Conference International Journal of Modern Physics: Conference Series · January 2016 Hadronic parity violation uses quark-quark weak interactions to probe nonperturbative strong interaction dynamics through two nonperturbative QCD scales: [Formula: see text] and the fine-tuned MeV scales of NN bound states in low energy nuclear ph ... Full text Cite

Exploratory study of fission product yields of neutron-induced fission of U 235, U 238, and Pu 239 at 8.9 MeV EXPLORATORY STUDY of FISSION PRODUCT YIELDS ... C. BHATIA et al.

Journal Article Physical Review C - Nuclear Physics · June 5, 2015 Using dual-fission chambers each loaded with a thick (200-400-mg/cm2) actinide target of 235,238U or Pu239 and two thin (∼10-100-μg/cm2) reference foils of the same actinide, the cumulative yields of fission products ranging from Sr92 to Nd147 have been me ... Full text Cite

Dual-fission chamber and neutron beam characterization for fission product yield measurements using monoenergetic neutrons

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · September 1, 2014 A program has been initiated to measure the energy dependence of selected high-yield fission products used in the analysis of nuclear test data. We present out initial work of neutron activation using a dual-fission chamber with quasi-monoenergetic neutron ... Full text Cite

Frozen spin target system for high intensive gamma-ray source at DFELL of TUNL

Conference Proceedings of Science · June 18, 2014 The UVa group in collaboration with the TUNL group is currently building a frozen spin target system for the high intensity gamma-ray source (HIγS) at the Duke Free Electron Laser Laboratory (HIFROST). The heart of the system is a dilution refrigerator whi ... Cite

Measurement of the half-life of the T= 12 mirror decay of Ne 19 and its implication on physics beyond the standard model

Journal Article Physical Review Letters · May 27, 2014 The 12+→12+ superallowed mixed mirror decay of Ne19 to F19 is excellently suited for high precision studies of the weak interaction. However, there is some disagreement on the value of the half-life. In a new measurement we have determined this quantity to ... Full text Cite

Neutron-deuteron analyzing power data at En=22.5 MeV

Conference Physical Review C - Nuclear Physics · May 12, 2014 We present measurements of n-d analyzing power, Ay(θ), at En=22.5 MeV. The experiment uses a shielded neutron source which produced polarized neutrons via the 2H(d - ,n - )3He reaction. It also uses a deuterated liquid-scintillator center detector and six ... Full text Cite

Measurement of the elastic scattering cross section of neutrons from argon and neon

Journal Article Physical Review C - Nuclear Physics · May 21, 2013 Background: The most significant source of background in direct dark matter searches are neutrons that scatter elastically from nuclei in the detector's sensitive volume. Experimental data for the elastic scattering cross section of neutrons from argon and ... Full text Cite

Nuclear physics detector technology applied to plant biology research

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · January 1, 2013 The ability to detect the emissions of radioactive isotopes through radioactive decay (e.g. beta particles, x-rays and gamma-rays) has been used for over 80 years as a tracer method for studying natural phenomena. More recently a positron emitting radioiso ... Full text Cite

Proposal for the Simultaneous Measurement of the Neutron-Neutron and Neutron-Proton Quasi-Free Scattering Cross Section via the Neutron-Deuteron Breakup Reaction at En = 19 MeV

Journal Article Few-Body Systems · January 1, 2013 In order to confirm or refute the present discrepancy between data and calculation for the neutron-neutron quasi-free scattering cross section in the neutron-deuteron breakup reaction, we describe a new experimental approach currently being pursued at TUNL ... Full text Cite

Imaging corn plants with PhytoPET, a modular PET system for plant biology

Journal Article IEEE Nuclear Science Symposium Conference Record · January 1, 2013 PhytoPET is a modular positron emission tomography (PET) system designed specifically for plant imaging. The PhytoPET design allows flexible arrangements of PET detectors based on individual standalone detector modules built from single Hamamatsu H8500 pos ... Full text Cite

MEASUREMENT OF FISSION PRODUCT YIELDS FROM FAST-NEUTRON-INDUCED FISSION

Conference FISSION AND PROPERTIES OF NEUTRON-RICH NUCLEI, ICFN5 · January 1, 2013 Link to item Cite

Experiment on direct n-n scattering – the radiation-induced outgassing complication

Journal Article Nuclear Physics A · December 1, 2012 The first direct neutron-neutron scattering experiment using the YAGUAR pulsed reactor has yielded initial results. They show a unforeseen significant thermal neutron background as a result of radiation-induced desorption within the scattering chamber. The ... Full text Cite

Ethernet-based flash ADC for a plant PET detector system

Journal Article IEEE Nuclear Science Symposium Conference Record · December 1, 2012 We have developed a flash analog to digital (ADC) based read out system to be used for a Positron Emission Tomography (PET) system. The custom designed 16 channel 12-bit Ethernet-based flash ADC (EFADC-16) unit operates at 250 MHz/s/channel utilizing a gig ... Full text Cite

PhytoPET: Design and initial results of modular PET for plant biology

Journal Article IEEE Nuclear Science Symposium Conference Record · December 1, 2012 We have developed a positron emission tomography (PET) system designed specifically for plant imaging in Phytotron at Duke University. Initial evaluation of a PhytoPET system to image the biodistribution of the positron emitting tracer 11C in live plants i ... Full text Cite

Neutron scattering from 28Si and 32S from 8.0 to 18.9 MeV, dispersive optical model analyses, and ground-state correlations

Journal Article Physical Review C - Nuclear Physics · September 10, 2012 Background: The nucleon-nucleus dispersive optical model (DOM) has been successful in providing good fits to scattering data and in making valuable predictions for bound-state properties in single- and double-closed shell nuclei. However, the generalizabil ... Full text Cite

Virtual Compton scattering and the generalized polarizabilities of the proton at Q2=0.92 and 1.76 GeV2

Journal Article Physical Review C - Nuclear Physics · July 25, 2012 Virtual Compton scattering (VCS) on the proton has been studied at the Jefferson Laboratory using the exclusive photon electroproduction reaction ep→epγ. This paper gives a detailed account of the analysis which has led to the determination of the structur ... Full text Cite

SU-E-T-108: 3D Measurement of Neutron Dose from a Novel Neutron Imaging Technique.

Journal Article Med Phys · June 2012 PURPOSE: We have been developing a fast-neutron spectroscopic technique to quantitatively image the distribution of elements in the body using quasi-monochromatic neutron beams. Previously, we demonstrated the ability of the technique to quantify specific ... Full text Link to item Cite

Cross-section measurements of 2H(n,np)n in symmetric star configurations

Journal Article Physical Review C - Nuclear Physics · May 16, 2012 Cross-section measurements have been made at 16 and 19 MeV in two exit-channel configurations of neutron-deuteron breakup: the space star and coplanar star. In this kinematically complete measurement, the outgoing proton and one of the neutrons were detect ... Full text Cite

Cross-section measurement of 9Be(γ,n)8Be and implications for α+α+n→9Be in the r process

Journal Article Physical Review C - Nuclear Physics · April 3, 2012 Models of the r process are sensitive to the production rate of 9Be because, in explosive environments rich in neutrons, α(αn,γ) 9Be is the primary mechanism for bridging the stability gaps at A=5 and A=8. The α(αn,γ)9Be reaction represents a two-step proc ... Full text Cite

Dipole response of 238U to polarized photons below the neutron separation energy

Journal Article Physical Review C - Nuclear Physics · April 2, 2012 Nuclear resonance fluorescence experiments were carried out at the High-Intensity γ-ray Source facility at Triangle Universities Nuclear Laboratory to characterize the low-energy dipole structure of 238U using 100% linearly polarized photon beams from 2.0 ... Full text Cite

PhytoBeta imager: a positron imager for plant biology.

Journal Article Physics in Medicine and Biology · 2012 Link to item Cite

Nuclear physics detector technology applied to plant biology research

Journal Article Nuclear Instruments and Methods in Physics Research A · 2012 Link to item Cite

Measurements of the 48Ca(γ,n) reaction

Journal Article Physical Review C - Nuclear Physics · October 31, 2011 The 48Ca(γ,n) cross section was measured by using γ-ray beams of energies between 9.5 and 15.3 MeV generated at the Triangle Universities Nuclear Laboratory high-intensity γ-ray source. Prior to this experiment, no direct measurements had been made with γ- ... Full text Cite

Characterization of an INVS model IV neutron counter for high precision (γ,n) cross-section measurements

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · August 11, 2011 A neutron counter designed for assay of radioactive materials has been adapted for beam experiments at TUNL. The cylindrical geometry and 60% maximum efficiency make it well suited for (γ,n) cross-section measurements near the neutron emission threshold. A ... Full text Cite

Asymmetry dependence of nucleon correlations in spherical nuclei extracted from a dispersive-optical-model analysis

Journal Article Physical Review C - Nuclear Physics · June 15, 2011 Neutron elastic-scattering angular distributions were measured at beam energies of 11.9 and 16.9 MeV on Ca40,48 targets. These data plus other elastic-scattering measurements, total and reaction cross-sections measurements, (e,e′p) data, and single-particl ... Full text Cite

Cross-section measurements of neutron-induced reactions on GaAs using monoenergetic beams from 7.5 to 15 MeV

Journal Article Physical Review C - Nuclear Physics · April 28, 2011 Cross-section measurements for neutron-induced reactions on GaAs have been carried out at twelve different neutron energies from 7.5 to 15 MeV using the activation technique. The monoenergetic neutron beams were produced via the H2(d,n)He3 reaction. GaAs s ... Full text Cite

Discrete deexcitations in U235 below 3 MeV from nuclear resonance fluorescence

Journal Article Physical Review C - Nuclear Physics · April 21, 2011 Gamma-ray transitions in U235 were measured using the (γ, γ') reaction below 3 MeV. The nuclear-resonance-fluorescence experiment was carried out at the High-Intensity γ-ray Source facility using nearly monoenergetic and circularly polarized photon beams. ... Full text Cite

Discovery of low-lying E1 and M1 strengths in Th232

Journal Article Physical Review C - Nuclear Physics · March 25, 2011 Properties of low-energy dipole states in Th232 have been investigated with the nuclear resonance fluorescence technique. The present work used monoenergetic γ-ray beams at energies of 2-4 MeV from the high-intensity γ-ray source at Triangle Universities N ... Full text Cite

Cross section measurements of neutron induced reactions on GaAs using monoenergetic beams from 7.5 to 15 MeV

Journal Article Journal of Physics: Conference Series · January 1, 2011 Cross section measurements for the neutron induced reactions on GaAs have been carried out at ten different neutron energies from 7.5 to 15 MeV, using the activation technique. The monoenergetic neutron beams were produced via the 2H(d,n)3He reaction, know ... Full text Cite

Development of PhytoPET: A plant imaging PET system

Journal Article IEEE Nuclear Science Symposium Conference Record · January 1, 2011 The development and initial evaluation of a high-resolution positron emission tomography (PET) system to image the biodistribution of positron emitting tracers in live plants is underway. The positron emitting 11CO2 tracer is used in plant biology research ... Full text Cite

Compact beta particle/positron imager for plant biology

Journal Article IEEE Nuclear Science Symposium Conference Record · December 1, 2010 The 11 CO2 tracer is used to facilitate plant biology research towards optimization of plant productivity, biofuel development and carbon sequestration in biomass. Positron emission tomography (PET) imaging has been used to study carbon transport in live p ... Full text Cite

Measurement of the Am241(γ,n)Am240 reaction in the giant dipole resonance region

Journal Article Physical Review C - Nuclear Physics · November 30, 2010 The photodisintegration cross section of the radioactive nucleus Am 241 has been obtained using activation techniques and monoenergetic γ-ray beams from the HIγS facility. The induced activity of Am 240 produced via the Am241(γ,n) reaction was measured in ... Full text Cite

A feasibility study using radiochromic films for fast neutron 2D passive dosimetry.

Journal Article Phys Med Biol · September 7, 2010 The objective of this paper is threefold: (1) to establish sensitivity of XRQA and EBT radiochromic films to fast neutron exposure; (2) to develop a film response to radiation dose calibration curve and (3) to investigate a two-dimensional (2D) film dosime ... Full text Link to item Cite

Neutron-deuteron analyzing power data at 19.0 MeV

Journal Article Physical Review C - Nuclear Physics · February 23, 2010 Measurements of neutron-deuteron (n-d) analyzing power Ay(θ) at En=19.0 MeV are reported at 16 angles from θc.m.=46.7 to 152.0°. The objective of the experiment is to better characterize the discrepancies between n-d data and the predictions of three-nucle ... Full text Open Access Cite

SU‐GG‐I‐159: In‐Vivo Iron Measurement through Nuclear Resonance Fluorescence

Conference Medical Physics · January 1, 2010 In‐vivo quantitative measurement of iron has been the focus of several studies related to iron disorders in the human body. Techniques such as SQUID and MRI have been used to detect liver iron stores in patients afflicted with hemochromatosis and thalassem ... Full text Cite

Neutron-deuteron analyzing power at 19.0 MeV

Journal Article Phys. Rev. · 2010 Cite

Basis for green energy multiplier*alternative nuclear technology (GEM*ART)

Journal Article Transactions of the American Nuclear Society · December 31, 2009 Cite

Positron emission tomography detector development for plant biology

Journal Article IEEE Nuclear Science Symposium Conference Record · December 1, 2009 There are opportunities for the development of new tools to advance plant biology research through the use of radionuclides. Thomas Jefferson National Accelerator Facility, Duke University, West Virginia University and the University of Maryland are collab ... Full text Cite

Cross sections for U238(n,n'γ) and U238(n,2nγ) reactions at incident neutron energies between 5 and 14 MeV

Journal Article Physical Review C - Nuclear Physics · August 6, 2009 Precision measurements of U238(n,n'γ) and U238(n,2nγ) partial cross sections have been performed at Triangle Universities Nuclear Laboratory (TUNL) to improve crucial data needed for testing nuclear reaction models in the actinide mass region. A pulsed and ... Full text Cite

Current status of the experiment on direct measurement of neutron-neutron scattering length at the reactor yaguar

Journal Article AIP Conference Proceedings · May 14, 2009 A new experiment was proposed in 2002 to perixirm the first direct measurement of neutron-neutron scattering on the powerful pulsed reactor YAGUAR located at Snezhinsk, Ural region, Russia. Extensive efforts were made to model the background conditions and ... Full text Cite

Photodisintegration cross section of241Am

Journal Article AIP Conference Proceedings · May 5, 2009 The photodisintegration cross section of radioactive 241Am has been obtained for the first time using monoenergetic γ-ray beams from the HIγS facility. The induced activity of240Am produced via the 241Am(γ,n) reaction in the γ-ray energy range from 9.5 to ... Full text Cite

Neutron detection efficiency determinations for the TUNL neutron-neutron and neutron-proton scattering-length measurements

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · February 11, 2009 The methods employed and the results obtained from measurements and calculations of the detection efficiency for the neutron detectors used at Triangle Universities Nuclear Laboratory (TUNL) in the simultaneous determination of the 1S0 neutron-neutron and ... Full text Cite

Virtual Compton scattering and neutral pion electroproduction in the resonance region up to the deep inelastic region at backward angles

Journal Article Physical Review C - Nuclear Physics · January 5, 2009 We have made the first measurements of the virtual Compton scattering (VCS) process via the H(e, e'p)γ exclusive reaction in the nucleon resonance region, at backward angles. Results are presented for the W-dependence at fixed Q2=1 GeV2 and for the Q2 depe ... Full text Cite

SU‐FF‐T‐436: Comparison of Neutron Doses to a Water Target Exposed to a 10 MeV Neutron Beam: Foil Activation Method Vs. Monte Carlo Simulations

Conference Medical Physics · January 1, 2009 We developed a mouse dosimetry model for neutron beam, and compared the calculated and simulated neutron doses for a water target (mouse) exposed to a 10 MeV neutron beam. We also estimated the longitudinal neutron dose profile for the water target. A wate ... Full text Cite

SU‐FF‐T‐372: Novel Neutron Dosimetry Using Radiochromic Films for 10 MeV Neutrons

Conference Medical Physics · January 1, 2009 The purpose of this paper is to estimate neutron doses using radiochromic XRQA films. Five radiochromic films, placed at varying distances from the neutron source and a water bottle, were exposed to a flux of 10 MeV neutrons produced via the d(d, n)He reac ... Full text Cite

Neutrons from a proton-driven deuterium target as a possible competitor to spallation for nuclear energy applications

Journal Article Nuclear Science and Engineering · January 1, 2009 Measurements are reported on the yield of neutrons from protons in the energy range from 7 to 17 MeV striking a stopping-length target of deuterium gas. This combination of beam and target is being investigated as an alternative to spallation for accelerat ... Full text Cite

Reducing Parasitic Thermal Neutron Absorption in Graphite by 30%

Journal Article Nucl. Science and Eng. · 2009 Cite

Exploring the transport of plant metabolites using positron emitting radiotracers.

Journal Article HFSP journal · August 2008 Short-lived positron-emitting radiotracer techniques provide time-dependent data that are critical for developing models of metabolite transport and resource distribution in plants and their microenvironments. Until recently these techniques were applied t ... Full text Cite

Cross section measurements of the B10(d,n0)C11 reaction below 160 keV

Journal Article Physical Review C - Nuclear Physics · May 27, 2008 New data were taken at the Triangle Universities Nuclear Laboratory to investigate the plausibility of using low energy deuterons and the B10(d,n)C11 reaction as a portable source of 6.3 MeV neutrons. Analysis of the data at and below incident deuteron ene ... Full text Cite

Measurement of the Am241(n,2n) reaction cross section from 7.6 MeV to 14.5 MeV

Journal Article Physical Review C - Nuclear Physics · May 27, 2008 The (n,2n) cross section of the radioactive isotope Am241 (T1/2=432.6 y) has been measured in the incident neutron energy range from 7.6 to 14.5 MeV in steps of a few MeV using the activation technique. Monoenergetic neutron beams were produced via the H2( ... Full text Cite

Measurement of the neutron-neutron scattering length using the π-d capture reaction

Journal Article Physical Review C - Nuclear Physics · May 23, 2008 We have determined a value for the 1S0 neutron-neutron scattering length (ann) from high-precision measurements of time-of-flight spectra of neutrons from the H2(π-,nγ)n capture reaction. The measurements were done at the Los Alamos Meson Physics Facility ... Full text Cite

Neutron-stimulated emission computed tomography of a multi-element phantom.

Journal Article Phys Med Biol · May 7, 2008 This paper describes the implementation of neutron-stimulated emission computed tomography (NSECT) for non-invasive imaging and reconstruction of a multi-element phantom. The experimental apparatus and process for acquisition of multi-spectral projection d ... Full text Link to item Cite

Experimental detection of iron overload in liver through neutron stimulated emission spectroscopy.

Journal Article Physics in medicine and biology · May 2008 Iron overload disorders have been the focus of several quantification studies involving non-invasive imaging modalities. Neutron spectroscopic techniques have demonstrated great potential in detecting iron concentrations within biological tissue. We are de ... Full text Cite

Neutron-proton analyzing power at 12 MeV and inconsistencies in parametrizations of nucleon-nucleon data

Journal Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · February 21, 2008 We present the most accurate and complete data set for the analyzing power Ay (θ) in neutron-proton scattering. The experimental data were corrected for the effects of multiple scattering, both in the center detector and in the neutron detectors. The final ... Full text Cite

Neutron stimulated emission computed tomography for diagnosis of breast cancer

Journal Article IEEE Transactions on Nuclear Science · January 1, 2008 Neutron stimulated emission computed tomography (NSECT) is being developed as a non-invasive spectroscopic imaging technique to determine element concentrations in the human body. NSECT uses a beam of fast neutrons that scatter inelastically from atomic nu ... Full text Cite

Commissioning of the booster injector synchrotron for the HIGS facility at Duke University

Journal Article Proceedings of the IEEE Particle Accelerator Conference · December 1, 2007 A booster synchrotron (Duke booster) has been built and recently commissioned at Duke University Free Electron Laser Laboratory (DFELL) as part of the High Intensity Gamma-ray Source (HIGS) facility upgrade. HIGS is collaboration between the DFELL and Tria ... Full text Cite

Elemental spectrum of a mouse obtained via neutron stimulation

Journal Article Progress in Biomedical Optics and Imaging - Proceedings of SPIE · October 15, 2007 Several studies have shown that the concentration of certain elements may be a disease indicator. We are developing a spectroscopic imaging technique, Neutron Stimulated Emission Computed Tomography (NSECT), to non-invasively measure and image elemental co ... Full text Cite

Design and development of a high-energy gamma camera for use with NSECT imaging: Feasibility for breast imaging

Journal Article IEEE Transactions on Nuclear Science · October 1, 2007 A new spectroscopic imaging technique, Neutron Stimulated Emission Computed Tomography (NSECT), is currently being developed to non-invasively and non-destructively measure and image elemental concentrations within the body. NSECT has potential for use in ... Full text Cite

Performance Characterization of a Miniature, High Sensitivity Gamma Ray Camera

Journal Article IEEE Transactions on Nuclear Science · October 2007 Full text Cite

Pulsed and monoenergetic beams for neutron cross-section measurements using activation and scattering techniques at Triangle Universities Nuclear Laboratory

Journal Article Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · August 1, 2007 In support of the Stewardship Science Academic Alliances initiative, an experimental program has been developed at Triangle Universities Nuclear Laboratory (TUNL) to measure (n,xn) cross-sections with both in-beam and activation techniques with the goal of ... Full text Cite

Study of collective dipole excitations below the giant dipole resonance at HIγS

Journal Article AIP Conference Proceedings · April 4, 2007 The High-Intensity Gamma-ray Source utilizing intra-cavity back-scattering of free electron laser photons from relativistic electrons allows one to produce a unique beam of high-flux gamma rays with 100% polarization and selectable energy and energy resolu ... Full text Cite

Extracting the neutron-neutron scattering length from neutron-deuteron breakup

Journal Article Chiral Dynamics 2006 - Proceedings of the 5th International Workshop on Chiral Dynamics, Theory and Experiment, CD 2006 · January 1, 2007 This article provides a brief summary of the values for the 1S0 neutron-neutron scattering length obtained from neutron-deuteron breakup cross-section measurements. The results of recent kinematically incomplete and complete experiments are reported, and a ... Full text Cite

Missing dipole excitation strength below the particle threshold

Conference Proceedings of Science · January 1, 2007 High sensitivity studies of E1 andM1 excitations fromthe 138Ba(γ,γ') reaction at energies close to the neutron emission threshold have been performed. The electric dipole character of the "pygmy" mode was experimentally verified for excitations from 5.5-8. ... Cite

Neutron stimulated emission computed tomography: Background corrections

Journal Article Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · January 1, 2007 Neutron stimulated emission computed tomography (NSECT) is an imaging technique that provides an in-vivo tomographic spectroscopic image of the distribution of elements in a body. To achieve this, a neutron beam illuminates the body. Nuclei in the body alo ... Full text Cite

Commissioning of the booster injector synchrotron for the HIGS facility at Duke University

Conference 2007 IEEE PARTICLE ACCELERATOR CONFERENCE, VOLS 1-11 · January 1, 2007 Link to item Cite

Introduction to neutron stimulated emission computed tomography.

Journal Article Phys Med Biol · July 21, 2006 Neutron stimulated emission computed tomography (NSECT) is presented as a new technique for in vivo tomographic spectroscopic imaging. A full implementation of NSECT is intended to provide an elemental spectrum of the body or part of the body being interro ... Full text Link to item Cite

Rotating slat collimator design for high-energy near-field imaging

Journal Article Progress in Biomedical Optics and Imaging - Proceedings of SPIE · July 3, 2006 Certain elements (such as Fe, Cu, Zn, etc.) are vital to the body and an imbalance of such elements can either be a symptom or cause of certain pathologies. Neutron Stimulated Emission Computed Tomography (NSECT) is a spectroscopic imaging technique whereb ... Full text Cite

Breast cancer diagnosis using neutron stimulated emission computed tomography: Dose and count requirements

Journal Article Progress in Biomedical Optics and Imaging - Proceedings of SPIE · June 30, 2006 Neutron Stimulated Emission Computed Tomography (NSECT) was evaluated as a potential technique for breast cancer diagnosis. NSECT can form a 3D tomographic image with an elemental (isotopic) spectrum provided at each reconstructed voxel. The target is illu ... Full text Cite

Low-energy dipole modes of excitation below the neutron separation energy

Journal Article AIP Conference Proceedings · March 13, 2006 The nuclear resonance fluorescence experiments have been performed at the High Intensity Gamma Source (HIγS) on 138Ba nuclei using four 60% efficient HPGe detectors. Excitation energies, spin, parities, and decay branching ratios were measured for the low- ... Full text Cite

The ratio of proton electromagnetic form factors via recoil polarimetry at Q2 = 1.13 (GeV/c)2

Journal Article Nuclear Physics A · January 9, 2006 Recoil polarimetry was used to extract the ratio of the proton electromagnetic form factors, μp GEp/ GMp = 0.878 ± 0.064(stat) ± 0.012(sys), at Q2 = 1.13 (GeV/c)2 from the reaction 1H(e, ep). This was an ancillary measurement in which the proton polarizati ... Full text Cite

Astrophysical S factor for the Li7(d,n0)Be8 and Li7(d,n1)Be8 reactions

Journal Article Physical Review C - Nuclear Physics · January 1, 2006 The absolute astrophysical S factor and cross section for the Li7(d,n0)Be8 and Li7(d,n1)Be8 reactions have been determined using deuteron beams with energies between 45 and 80 keV. The slope of the S factor is consistent with zero in the n0 case but is sli ... Full text Cite

Neutron-deuteron breakup experiment at En=13MeV: Determination of the 1S0 neutron-neutron scattering length ann

Journal Article Physical Review C - Nuclear Physics · January 1, 2006 We report on results of a kinematically complete neutron-deuteron breakup experiment performed at Triangle Universities Nuclear Laboratory using an En=13 MeV incident neutron beam. The 1S0 neutron-neutron scattering length ann has been determined for four ... Full text Cite

Non-invasive estimation of potassium (39K) in Bovine Liver using Neutron Stimulated Emission Computed Tomography (NSECT)

Journal Article IEEE Nuclear Science Symposium Conference Record · January 1, 2006 Neutron stimulated emission computed tomography (NSECT) is being developed as a non-invasive technique to measure element concentration in in-vivo tissue at molecular levels. We have developed a system that performs this task using an incident neutron beam ... Full text Cite

Design and construction of a prototype rotation modulation collimator for near-field high-energy spectroscopic gamma imaging

Journal Article IEEE Nuclear Science Symposium Conference Record · January 1, 2006 Neutron Stimulated Emission Computed Tomography (NSECT) is being developed for in vivo measurement of the concentration and location of biologically relevant elements. NSECT is a spectroscopic imaging technique whereby the body is illuminated via high-ener ... Full text Cite

The Li7(d→,n0)Be8 and Li7(d→,n1)Be8 reactions below 160 keV

Journal Article Physical Review C - Nuclear Physics · January 1, 2006 The polarization observables have been determined for the Li7(d→,n0)Be8 and Li7(d→,n1)Be8 reactions at beam energies between 80 and 160 keV. A Transition Matrix Element (TME) analysis revealed unique, dominant p-wave solutions for both neutron channels. Th ... Full text Cite

Development of a High-Energy Gamma Camera for use with NSECT Imaging of the Breast

Conference 2006 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOL 1-6 · January 1, 2006 Link to item Cite

Neutron Spectroscopy of Mouse Using Neutron Stimulated Emission Computed Tomography (NSECT)

Conference 2006 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOL 1-6 · January 1, 2006 Link to item Cite

Neutron Stimulated Emission Computed Tomography (NSECT) for Early Detection of Breast Cancer

Conference 2006 IEEE Nuclear Science Symposium Conference Record · 2006 Full text Cite

Direct nn-scattering at the YAGUAR reactor

Journal Article Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms · December 1, 2005 The Direct Investigation of ann Association (DIANNA) is finalizing the design of a direct measurement of the nn-scattering length to be performed at the YAGUAR reactor in Snezhinsk, Russia. Extensive modeling of the neutron field, nn-scattering kinematics, ... Full text Cite

Recommissioning of duke storage ring with a rom-damped RF cavity and a new straight section lattice for fels

Journal Article Proceedings of the IEEE Particle Accelerator Conference · December 1, 2005 The Duke FEL lab operates a unique UV/VUV storage ring FEL and an FEL driven nearly monochromatic, highly polarized, high intensity Compton gamma-ray source. The Duke storage ring light source is undergoing several phases of upgrade in order to significant ... Full text Cite

Non-invasive quantification of iron56Fe in beef liver using neutron stimulated emission computed tomography

Journal Article IEEE Nuclear Science Symposium Conference Record · December 1, 2005 Neutron spectroscopy is being developed as a noninvasive tool to measure element concentration in the body at molecular levels. We are developing a neutron stimulated emission computed tomography (NSECT) system to identify element concentrations in tissue, ... Full text Cite

Erratum: Proton elastic form factor ratios to Q2=3.5GeV2 by polarization transfer (Physical Review C (2005) 71 (055202))

Journal Article Physical Review C - Nuclear Physics · June 1, 2005 This paper was published online on 20 May 2005 without several of the authors' corrections incorporated. Equation (13) has been replaced. The captions of Figs. 16-18 have also been replaced. Typographical errors on pages 4, 6, 14, 15, 18, 19, 22, and 24 ha ... Full text Cite

Photon analyzing power for the three-body breakup of 3He at Eγ = 15.0 MeV

Journal Article AIP Conference Proceedings · May 6, 2005 Photon analyzing power for the three-body breakup of 3He has been studied at Eγ = 15.0 MeV. The measurements were done at the HIγS facility at Duke University. © 2005 American Institute of Physics. ... Full text Cite

Direct nn-Scattering Measurement with the Pulsed Reactor YAGUAR

Journal Article J. Res. Natl. Inst. Stand. Technol. · 2005 Cite

The high intensity gamma-ray source HIGS and recent measurements

Journal Article Nucl. Instr. Methods B. · 2005 The high intensity γ-ray source (HIγS) utilizes intra-cavity backscattering of free electron laser photons from the Duke electron storage ring to produce a unique monoenergetic beam of high-flux γ-rays with high polarization and selectable e ... Cite

Cross-section measurements of neutron-deuteron breakup at 13.0 MeV

Journal Article Physical Review C - Nuclear Physics · January 1, 2005 Cross-section measurements of seven exit-channel configurations in the neutron-deuteron breakup at 13.0 MeV are reported and compared to rigorous calculations. Our data are consistent with those of previous measurements in four of six configurations. The p ... Full text Cite

A direct measurement of the neutron-neutron scattering length

Journal Article Brazilian Journal of Physics · January 1, 2005 A direct measurement of nn-scattering by colliding free neutrons has never been performed. Indirect measurements continue to provide inconsistent results, leaving the issue of charge symmetry in the nuclear force unresolved. At present the Russian pulsed r ... Full text Cite

Measurements of Ay(θ) for C12(n,n)C12 from En=2.2 to 8.5 MeV

Journal Article Physical Review C - Nuclear Physics · January 1, 2005 The analyzing power Ay(θ) for neutron elastic scattering from C12 has been measured for 33 neutron energies between En=2.2 and 8.5 MeV in the angular range from 25° to 145° in the laboratory system. The primary motivation for these measurements is the need ... Full text Cite

A dispersive optical model for n +120Sn from -15 to +80 MeV and properties of neutron single-particle and single-hole states

Journal Article Journal of Physics G: Nuclear and Particle Physics · December 1, 2004 Data for σ(θ) and Ay(θ) previously obtained at the Triangle Universities Nuclear Laboratory for 120Sn(n, n) are combined with other measurements of σ(θ) and Ay(θ) to create an elastic-scattering database from 9.9 to 24 MeV. In addition, relatively recent h ... Full text Cite

Calculations of neutron spectra after neutron-neutron scattering

Journal Article Journal of Physics G: Nuclear and Particle Physics · September 1, 2004 A direct neutron-neutron scattering length, ann, measurement with the goal of 3% accuracy (0.5 fm) is under preparation at the aperiodic pulsed reactor YAGUAR. A direct measurement of ann will not only help resolve conflicting results of ann by indirect me ... Full text Cite

Neutron stimulated emission computed tomography of stable isotopes

Journal Article Proceedings of SPIE - The International Society for Optical Engineering · July 5, 2004 Here we report on the development of a new molecular imaging technique using inelastic scattering of fast neutrons. Earlier studies demonstrated a significant difference in trace element concentrations between benign and malignant tissue for several cancer ... Full text Cite

Basic Instrumentation for Hall A at Jefferson Lab

Journal Article Nucl. Instrum. & Meth. · 2004 Cite

Modeling Fast Neutron Shielding for the nn-Experiment

Journal Article Accelerator Applications in a Nuclear Renaissance · 2004 Cite

Dynamics of the quasielastic16O(e,e′p) reaction at Q 2≈0.8 (GeV/c)2

Journal Article Physical Review C - Nuclear Physics · 2004 The physics program in Hall A at Jefferson Lab commenced in the summer of 1997 with a detailed investigation of the 16O(e,e′p) reaction in quasielastic. constant (q,ω) kinematics at Q2≈0.8 (GeV/c)2, q ≈ 1 GeV/c, and ω≈445 MeV. Use of a self-calibrating, se ... Full text Cite

Measurement of the neutron electric form factor via recoil polarimetry

Journal Article European Physical Journal A · October 1, 2003 The ratio Gem/Gmn of the electric to the magnetic form factor of the neutron has been measured by analyzing the polarization of the recoiling neutron in quasi-elastic scattering of longitudinally polarized electrons from deuterium at the Q2 values of 0.45, ... Full text Cite

Measurements of GnE/GnM from the 2H(e-->,en-->)1H Reaction to Q2=1.45 (GeV/c)2.

Journal Article Physical review letters · September 2003 We report new measurements of the ratio of the electric form factor to the magnetic form factor of the neutron, G(n)(E)/G(n)(M), obtained via recoil polarimetry from the quasielastic 2H(e-->,e(')n-->)1H reaction at Q2 values of 0.45, 1.13, and 1.45 (GeV/c) ... Full text Cite

Results from Indirect Measurements of the 1S0 Neutron-Neutron Scattering Length

Conference AIP Conference Proceedings · August 26, 2003 The ultra-high sensitivity of the 1S0 nucleon-nucleon (NN) scattering length to the strength of the nuclear potential makes it a central parameter for quantifying charge symmetry breaking in the strong nuclear force. Of the three 1S0 NN scattering lengths, ... Full text Cite

Direct Measurement of Neutron-Neutron Scattering

Conference AIP Conference Proceedings · August 26, 2003 In order to resolve long-standing discrepancies in indirect measurements of the neutron-neutron scattering length ann and contribute to solving the problem of the charge symmetry of the nuclear force, the collaboration DIANNA (Direct Investigation of ann A ... Full text Cite

Neutron electric form factor up to Q2 = 1.47 (GeV/c)2

Journal Article European Physical Journal A · June 1, 2003 The ratio of the electric to the magnetic form factor of the neutron, g ≡ GEn/GMn, was measured via recoil polarimetry (R.G. Arnold, C.E. Carlson, F. Gross, Phys. Rev. C 23, 363 (1981)) from the quasielastic 2H(e→, e′ n→) 1H reaction at three values of Q2 ... Full text Cite

Accelerator-driven waste transmutation experiment.

Conference HEALTH PHYSICS · June 1, 2003 Link to item Cite

Electromagnetic effects and the long-standing three-nucleon analyzing power puzzle

Journal Article Modern Physics Letters A · February 28, 2003 New results for the neutron-deuteron analyzing power Ay (θ) at En = 1.2 and 1.9 MeV and their comparison to proton-deuteron data reveal a sizeable and unexpected difference which increases with decreasing center-of-mass energy. This finding calls for the t ... Full text Cite

A new twist to the long-standing three-nucleon analyzing power puzzle

Journal Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · January 16, 2003 New results for the neutron-deuteron analyzing power Ay(θ) at En = 1.2 and 1.9 MeV and their comparison to proton-deuteron data reveal a sizeable and unexpected difference which increases with decreasing center-of-mass energy. This finding calls for the th ... Full text Cite

Effects of the magnetic moment interaction between nucleons on observables in the [Formula Presented] continuum

Journal Article Physical Review C - Nuclear Physics · January 1, 2003 The influence of the magnetic moment interaction of nucleons on nucleon-deuteron elastic scattering and breakup cross sections and on elastic scattering polarization observables has been studied. Among the numerous elastic scattering observables only the v ... Full text Cite

Photodisintegration of the deuteron between E-gamma=2.4 and 4.0 MeV

Journal Article FEW BODY PROBLEMS IN PHYSICS '02 · January 1, 2003 Link to item Cite

Dispersive optical-model and coupled-channels descriptions of neutron scattering from [Formula Presented] and [Formula Presented] up to [Formula Presented]

Journal Article Physical Review C - Nuclear Physics · January 1, 2003 Differential cross sections [Formula Presented] and analyzing powers [Formula Presented] have been measured for neutron scattering from [Formula Presented] and [Formula Presented] at [Formula Presented] at the Triangle Universities Nuclear Laboratory using ... Full text Cite

Plane-wave impulse approximation extraction of the neutron magnetic form factor from quasielastic 3He(e,e′) at Q2 = 0.3 to 0.6 (GeV/c)2

Journal Article Physical Review C - Nuclear Physics · 2003 A high precision measurement of the transverse spin-dependent asymmetry AT′ in 3He→(e→,e′) quasielastic scattering was performed in Hall A at Jefferson Lab at values of the squared four-momentum transfer, Q2, between 0.1 and 0.6 (GeV/c)2. AT′ is sensitive ... Cite

Dispersive optical-model and coupled-channels descriptions of neutron scattering from 27Al and 59Co up to 80 MeV

Journal Article Physical Review C - Nuclear Physics · 2003 Differential cross sections σ(θ) and analyzing powers A y(θ) have been measured for neutron scattering from 27Al and 59Co at 15 MeV at the Triangle Universities Nuclear Laboratory using standard time-of-flight techniques. In addition, σ(θ) was measured for ... Cite

Measurements of GEn/GMn from the 2H(e, e′n)1H Reaction to Q2 = 1.45 (GeV/c)2

Journal Article Physical Review Letters · 2003 The measurements of GEn/GMn obtained via recoil polarimetry from the quasielastic 2H(e→,e′n→)1H reaction at three central Q2 values of 0.45, 1.15 and 1.47 (GeV/c)2 were reported. A beam of longitudinally polarized electrons was found to scatter quasielasti ... Cite

Effects of the magnetic moment interaction between nucleons on observables in the 3N continuum

Journal Article Physical Review C - Nuclear Physics · 2003 The influence of the magnetic moment interaction of nucleons on nucleon-deuteron elastic scattering and breakup cross sections and on elastic scattering polarization observables has been studied. Among the numerous elastic scattering observables only the v ... Cite

Modeling fast neutron shielding for the direct nn-scattering experiment

Journal Article International Meeting on Nuclear Applications of Accelerator Technology: Accelerator Application in a Nuclear Renaissance · January 1, 2003 Modern high power accelerators and reactors provide the possibility of a direct measurement of neutron-neutron scattering. This experiment addresses the fundamental problem of charge symmetry in the nuclear force by comparing the proton-proton, pp, and neu ... Cite

Plane-wave impulse approximation extraction of the neutron magnetic form factor from quasielastic [Formula Presented] at [Formula Presented] to [Formula Presented]

Journal Article Physical Review C - Nuclear Physics · January 1, 2003 A high precision measurement of the transverse spin-dependent asymmetry [Formula Presented] in [Formula Presented] quasielastic scattering was performed in Hall A at Jefferson Lab at values of the squared four-momentum transfer, [Formula Presented] between ... Full text Cite

Plane-wave impulse approximation extraction of the neutron magnetic form factor from quasielastic 3He(e,e′) at Q2 = 0.3 to 0.6 (GeV/c)2

Journal Article Physical Review C - Nuclear Physics · January 1, 2003 A high precision measurement of the transverse spin-dependent asymmetry AT′ in 3He→(e→,e′) quasielastic scattering was performed in Hall A at Jefferson Lab at values of the squared four-momentum transfer, Q2, between 0.1 and 0.6 (GeV/c)2. AT′ is sensitive ... Cite

Direct measurement of the neutron-neutron scattering cross section at the reactor YAGUAR

Journal Article Journal of Physics G: Nuclear and Particle Physics · October 1, 2002 We propose to perform the first measurement of the neutron-neutron scattering cross section in the through-channel of the pulsed aperiodic reactor YAGUAR (Snezhinsk, Russia). Such a measurement directly determines the neutron-neutron scattering length, and ... Full text Cite

Precision measurement of the spin-dependent asymmetry in the threshold region of 3H→e(e→, e′)

Journal Article Physical Review Letters · December 10, 2001 Experiments were carried out for the first precision measurements of spin-dependent asymmetry in the threshold region of 3He→(e→, e′). The analysis was performed for the probing of 3He ground-state structure and extracting the neutron electromagnetic form ... Cite

Precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e, e').

Journal Article Physical review letters · December 2001 We present the first precision measurement of the spin-dependent asymmetry in the threshold region of 3He(e,e') at Q2 values of 0.1 and 0.2 (GeV/c)2. The agreement between the data and nonrelativistic Faddeev calculations which include both final-state int ... Full text Cite

Nucleon-deuteron breakup: Truths and implications

Journal Article Nuclear Physics A · June 18, 2001 The results of recent nucleon-deuteron breakup experiments are reviewed, and a comparative evaluation of the data is presented. Discrepancies between data from different experiments are identified, and modest attempts to resolve the discrepancies are made. ... Full text Cite

Neutron–deuteron analyzing power at En=2.0 MeV

Journal Article Nuclear Physics A · March 12, 2001 Full text Cite

The space-star anomaly in nd breakup at 25 MeV

Journal Article Nuclear Physics A · March 12, 2001 Full text Cite

Nucleon-Deuteron Analyzing Power at En = 2.0 MeV

Journal Article Nucl. Phys. A · January 2001 Cite

Nucleon-Deuteron Breakup: Truths and Implications

Journal Article Nucl. Phys. A · 2001 Cite

Transverse asymmetry AT' from the quasielastic 3He(e,e') process and the neutron magnetic form factor.

Journal Article Physical review letters · October 2000 We have measured the transverse asymmetry A(T') in 3He(e,e(')) quasielastic scattering in Hall A at Jefferson Laboratory with high precision for Q2 values from 0.1 to 0.6 (GeV/c)(2). The neutron magnetic form factor G(n)(M) was extracted based on Faddeev c ... Full text Cite

G(E(p))/G(M(p)) ratio by polarization transfer in e-->p --> ep-->

Journal Article Physical review letters · February 2000 The ratio of the proton's elastic electromagnetic form factors, G(E(p))/G(M(p)), was obtained by measuring P(t) and P(l), the transverse and the longitudinal recoil proton polarization, respectively. For elastic e-->p-->ep-->, G(E(p))/G(M(p)) is proportion ... Full text Cite

Recent high-accuracy measurements of the S-1(0) neutron-neutron scattering length

Journal Article FEW-BODY PROBLEMS IN PHYSICS '99 · January 1, 2000 Link to item Cite

Polarization transfer in the 16o(e→,e′p→)15n reaction

Journal Article Physical Review C - Nuclear Physics · 2000 Cite

First measurement of the near-threshold 2H(γ,n)p analyzing power using a free-electron laser based γ-ray source

Journal Article Physical Review C - Nuclear Physics · January 1, 2000 The first measurement of the 2H(γ→,n)p analyzing power near threshold has been performed using the High-Intensity Gamma-ray Source (HIGS) at the Duke Free-Electron Laser Laboratory. A 3.58 MeV γ-ray beam having an energy resolution of 2.5% and 100% linear ... Cite

GEp/GMp Ratio by Polarization Transfer in ep → ep

Journal Article Physical Review Letters · 2000 Cite

First measurement of the near-threshold [Formula Presented] analyzing power using a free-electron laser based [Formula Presented]-ray source

Journal Article Physical Review C - Nuclear Physics · January 1, 2000 The first measurement of the [Formula Presented] analyzing power near threshold has been performed using the High-Intensity Gamma-ray Source (HIGS) at the Duke Free-Electron Laser Laboratory. A 3.58 MeV [Formula Presented]-ray beam having an energy resolut ... Full text Cite

Polarization transfer in the [Formula Presented] reaction

Journal Article Physical Review C - Nuclear Physics · January 1, 2000 The first [Formula Presented] polarization transfer measurements on a nucleus heavier than deuterium have been carried out at Jefferson Laboratory. Transverse and longitudinal components of the polarization of protons ejected in the reaction [Formula Prese ... Full text Cite

Polarization transfer in the 16o(e→,e′p→)15n reaction

Journal Article Physical Review C - Nuclear Physics · January 1, 2000 Cite

A new measurement of the 1S0 neutron-neutron scattering length using the neutron-proton scattering length as a standard

Journal Article Physical Review Letters · January 1, 1999 The present paper reports high-accuracy cross-section data for the 2H(n, nnp) reaction in the neutron-proton (np) and neutron-neutron (nn) final-state-interaction (FSI) regions at an incident mean neutron energy of 13.0 MeV. These data were analyzed with r ... Full text Cite

Measurements of the deuteron elastic structure function A(Q2) for 0.7 ≤ Q2 ≤ 6.0(GeV/c)2at jefferson laboratory

Journal Article Physical Review Letters · January 1, 1999 The deuteron elastic structure function A(Q2) has been extracted in the range 0.7 ≤ Q2 ≤ 6.0(GeV/c)2 from cross section measurements of elastic electron-deuteron scattering in coincidence using the Hall A Facility of Jefferson Laboratory. The data are comp ... Full text Cite

Extraction of the S-1(0) neutron-neutron scattering length from a kinematically-complete n-d breakup experiment at TUNL

Conference APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY, PTS 1 AND 2 · January 1, 1999 Link to item Cite

Hadronic probes of few-nucleon systems

Conference FEW-BODY PROBLEMS IN PHYSICS '98 · January 1, 1999 Link to item Cite

Experiments at the triangle universities nuclear laboratory for the undergraduate physics curriculum

Conference APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY, PTS 1 AND 2 · January 1, 1999 Link to item Cite

Toward a resolution of the neutron-neutron scattering-length issue

Journal Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · December 24, 1998 We report a high-precision determination of the 1S0 neutron-neutron scattering length (ann) using the 2H(π-,ny)n reaction. The value obtained in the present work is -18.50 ± 0.05 (statistical) ± 0.44 (systematic) ± 0.30 (theoretical) fm, which is consisten ... Full text Cite

Calibration of a Neutron Polarimeter to Measure the Electric Form Factor of the Neutron

Journal Article IEEE Transactions on Nuclear Science · December 1, 1998 We measured the analyzing power and the efficiency of a new neutron polarimeter that was designed to measure G£, the neutron electric form factor. The polarimeter calibration was performed as experiment E377 at the Indiana University Cyclotron Facility (IU ... Full text Cite

OK-4/Duke monochromatic gamma-ray source: performance and prediction

Journal Article Nuclear Instruments \& Methods In Physics Research Section A-accelerators Spectrometers Detectors And Associated Equipment · April 1998 Cite

Scattering length measurements from radiative pion capture and neutron-deuteron breakup

Journal Article Nuclear Physics A · March 2, 1998 The neutron-neutron and neutron-proton 1So scattering lengths ann and anp, respectively, were determined simultaneously from the neutron-deuteron breakup reaction. Their comparison with the recommended values obtained from "two-body" reactions gives a meas ... Full text Cite

Implications of the space-star anomaly in nd breakup

Journal Article Nuclear Physics A · March 2, 1998 Cross-section measurements of six exit-channel configurations in nd breakup at 13.0 MeV are reported and compared to rigorous calculations. Except for the coplanar-star configuration, our data are consistent with previous data. The present data for all con ... Full text Cite

Nuclear research at Duke [5]

Journal Article Science · January 23, 1998 Cite

Determination of the neutron detection efficiency of an NE213 scintillator for En = 2.5 to 16 MeV using the 2H(d, n)3He reaction

Journal Article Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment · September 11, 1997 The absolute efficiency of an NE213 liquid scintillator of 12.7 cm diameter and 5.08 cm thickness was measured in the neutron energy range 2.5-16 MeV using the 2H(d, n)3He reaction as a source of monoenergetic neutrons. The efficiencies were measured at th ... Full text Cite

Gamma-ray production in a storage ring free-electron laser

Journal Article Physical Review Letters · June 1997 Cite

Analyzing power measurements for the [Formula Presented] breakup reaction at 12 MeV

Journal Article Physical Review C - Nuclear Physics · January 1, 1997 We report the most extensive set of vector [Formula Presented] and tensor [Formula Presented] and [Formula Presented] analyzing-power data for the [Formula Presented] reaction. Two-particle coincidence data have been measured for six deuteron-proton, three ... Full text Cite

Verification of the space-star anomaly in nd breakup

Journal Article Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics · November 14, 1996 Cross-section measurements of a collinear configuration, the space-star and the coplanar-star configurations in nd breakup at En = 13.0 MeV are reported. The present measurements for the collinear configuration are in good agreement with pd and nd data. Ou ... Full text Cite

Selected topics of the few-nucleon research program at TUNL

Conference FEW-BODY PROBLEMS IN PHYSICS '95 · January 1, 1996 Link to item Cite

Probing the three-nucleon force using nucleon-deuteron breakup reactions

Journal Article Nuclear Inst. and Methods in Physics Research, B · May 5, 1995 Results of our recent kinematically complete cross-section measurements of the space-star and coplanar-star configurations in n-d breakup at 13.0 MeV are reported. The experimental setup and details of the analysis are described. The new data for the space ... Full text Cite

A new atomic beam polarized ion source for the Triangle Universities Nuclear Laboratory: overview, operating experience, and performance

Journal Article Nuclear Inst. and Methods in Physics Research, A · April 21, 1995 A newly constructed source of polarized H± and D± ions is described. Atomic H or D beams from a dissociator with a cooled nozzle enter a system of two sextupole magnets and several radio-frequency transitions where they are focused and polarized. They ente ... Full text Cite

Neutron-proton analyzing power at 12 MEV and charged pi NN coupling constant

Conference POLARIZATION PHENOMENA IN NUCLEAR PHYSICS · January 1, 1995 Link to item Cite

Resolution of discrepancy between backward angle cross-section data for neutron-deuteron elastic scattering

Journal Article Few-Body Systems · September 1, 1994 High-accuracy differential cross-section data for neutron-deuteron elastic scattering at centre-of-mass backward angles in the range from 140° to 178° have been measured to accuracies better than ±3% for incident neutron energies of 8.0, 10.0, and 14.0 MeV ... Full text Cite

Response-function measurement of an NE213 scintillator using the 2H(d, n)3He reaction

Journal Article Nuclear Inst. and Methods in Physics Research, A · January 1, 1994 The response function of a 12.5 cm diameter NE213 scintillator detector has been measured over neutron energies ranging from 4.9 to 16.6 MeV. Beams of monoenergetic neutrons were produced using the 2H(d, n)3He reaction. The response function is about 12% l ... Full text Cite

Neutron scattering from 12C between 15.6 and 17.3 MeV

Journal Article Journal of Physics G: Nuclear and Particle Physics · December 1, 1993 The differential cross section sigma ( theta ) for neutron elastic scattering from 12C and for inelastic scattering from the 4.44 MeV state was measured at 15.57, 16.75 and 17.29 MeV. The sigma ( theta ) data, together with published analysing power Ay( th ... Full text Cite

Novel probe of charge symmetry breaking: Deuteron-induced deuteron breakup.

Journal Article Physical review. C, Nuclear physics · December 1993 Full text Cite

Dipole and spin-dipole resonances in charge-exchange reactions on 12C.

Journal Article Physical review. C, Nuclear physics · September 1993 Full text Cite

Energy dependence of multipole strength distributions in the 32S(n,p)32P reaction.

Journal Article Physical review. C, Nuclear physics · August 1993 Full text Cite

The dispersive optical model for n + 208Pb and n + 209Bi

Journal Article Nuclear Inst. and Methods in Physics Research, B · June 2, 1993 The dispersive optical model (DOM) provides a natural connection between the shell model potential for bound states and the optical model for nucleon scattering at positive energies. At TUNL we have developed DOMs for neutron scattering for ten nuclei betw ... Full text Cite

The dispersive optical model for n + 208Pb and n + 209Bi

Journal Article Nuclear Inst. and Methods in Physics Research, B · 1993 The dispersive optical model (DOM) provides a natural connection between the shell model potential for bound states and the optical model for nucleon scattering at positive energies. At TUNL we have developed DOMs for neutron scattering for ten nuclei betw ... Cite

Neutron-proton analyzing power data between 7.6 and 18.5 MeV.

Journal Article Physical review. C, Nuclear physics · November 1992 Full text Cite

Elevated-temperature behavior of fe3al with chromium additions

Journal Article Materials Science And Engineering A-structural Materials Properties Microstructure And Processing · May 1992 Cite

Gamow-Teller and dipole strength distribution in 40Ca(n,p)40K reaction.

Journal Article Physical review. C, Nuclear physics · April 1992 Full text Cite

NUCLEAR STUDIES AT TUNL USING POLARIZED NEUTRON BEAMS

Conference BEIJING INTERNATIONAL SYMPOSIUM ON FAST NEUTRON PHYSICS · January 1, 1992 Link to item Cite

Ground-state Gamow-Teller strength in 64Ni(n,p)64Co cross sections at 90-240 MeV.

Journal Article Physical review. C, Nuclear physics · December 1991 Full text Cite

A processing method to reduce the environmental-effect in fe3al-based alloys

Journal Article Scripta Metallurgica Et Materialia · October 1991 Cite

Neutron-deuteron elastic scattering and breakup reactions below 20 MeV

Journal Article Nuclear Inst. and Methods in Physics Research, B · May 1, 1991 In this paper we review the results of a series of high-accuracy measurements on the neutron-deuteron (n-d) scattering system at incident neutron energies below 20 MeV. These measurements were designed to: 1) provide data of sufficient accuracy to be used ... Full text Cite

The low-energy neutron-deuteron analyzing power and the 3P0,1,2 interactions of nucleon-nucleon potentials

Journal Article Physics Letters B · March 28, 1991 Data for the analyzing power Ay(θ) for the elastic scattering of neutrons from deuterons have been measured at 5.0, 6.5 and 8.5 MeV to an accuracy of ±0.0035. Surprisingly large differences have been observed at these low energies between the data and rigo ... Full text Cite

GROUND-STATE GAMOW-TELLER STRENGTH IN 64NI(N,P)64CO

Conference SPIN AND ISOSPIN IN NUCLEAR INTERACTIONS · January 1, 1991 Link to item Cite

NEUTRON-PROTON ANALYZING POWER DATA AT 7.6, 12.0, 14.1, 16.0, 18.5 MEV

Journal Article JOURNAL DE PHYSIQUE · November 15, 1990 Link to item Cite

Analyzing power measurements for elastic scattering of 17 MeV neutrons from 120Sn.

Journal Article Physical review. C, Nuclear physics · June 1990 Full text Cite

Techniques for vector analyzing power measurements of the 2H(n, np)n breakup reaction at low energies

Journal Article Nuclear Inst. and Methods in Physics Research, A · May 10, 1990 Experimental methods to measure the vector analyzing powers over a broad range of kinematic configurations in the n-d breakup reaction have been developed at TUNL. These techniques employ the polarized beam facilities at TUNL and use the 2H(d, n)3He reacti ... Full text Cite

Few-body physics investigated through polarized neutron experiments in A ≤ 3 systems at TUNL

Journal Article Nuclear Inst. and Methods in Physics Research, B · April 2, 1989 Accurate polarization data obtained with neutrons below 20 MeV in the A ≤ 3 systems provide important new information on details of the nucleon-nucleon (NN) interaction. The two-nucleon and three-nucleon data favor the Paris potential over the new Bonn (OB ... Full text Cite

Analysing power for 12C(n,n0,1)12C and evaluation of n-12C scattering at 18.2 MeV

Journal Article Journal of Physics G: Nuclear Physics · December 1, 1988 The analysing power Ay( theta ) for 12C(n,n) 12C elastic scattering and for inelastic scattering to the first excited state (Jpi=2+, Q=-4.44 MeV) of 12C was measured at 18.2 MeV. A pulsed polarised neutron beam was produced via the 2H(d,n)3He polarisation ... Full text Cite

Scattering of polarized and unpolarized nucleons from 28Si.

Journal Article Physical review. C, Nuclear physics · October 1988 Full text Cite

Comparisons of vector analyzing-power data and calculations for neutron-deuteron elastic scattering from 10 to 14 MeV

Journal Article Few-Body Systems · March 1, 1987 High-accuracy analyzing-power Ay(θ) data for n-d elastic scattering at 12 MeV have been measured using the polarized-neutron facilities at the Triangle Universities Nuclear Laboratory (TUNL). The present data have been combined with our previous n-d measur ... Full text Cite

Coupled-channel analysis of nucleon scattering from sup40Ca up to 80 MeV.

Journal Article Physical review. C, Nuclear physics · April 1986 Full text Cite

Cross sections and analyzing powers for fast-neutron scattering to the ground and first excited states of 58Ni and 60Ni

Journal Article Nuclear Physics, Section A · May 13, 1985 Differential cross sections for neutron scattering from 58Ni and 60Ni to the ground state and first excited state have been measured at 8, 10, 12 and 14 MeV. In addition, analyzing powers were measured for scattering to the same states for 58Ni at 10 and 1 ... Full text Cite

ENERGY-DEPENDENCE OF THE LOCAL OPTICAL-POTENTIAL FOR NEUTRON-NUCLEUS SCATTERING

Journal Article AIP CONFERENCE PROCEEDINGS · January 1, 1985 Link to item Cite

SCATTERING OF POLARIZED AND UNPOLARIZED NEUTRONS FROM SI-28 AND S-32

Journal Article AIP CONFERENCE PROCEEDINGS · January 1, 1985 Link to item Cite

Simultaneous measurements of analyzing powers and differential cross sections for N+28Si

Journal Article IEEE Transactions on Nuclear Science · January 1, 1983 Scattering experiments conducted with beams of polarized neutrons give special information about the spin sensitive part of the neutron-nucleus interaction. Carefully controlled measurements of the analyzing power A(θ) for the scattering of polarized neutr ... Full text Cite

Measurements of analyzing power for H2(n, n)H2 scattering at 14.1 MeV and comparisons to H2(p, p)H2

Journal Article Physical Review C · January 1, 1983 Data for the analyzing power Ay() for the elastic scattering of neutrons from deuterons have been measured at 14.1 MeV for the range from 30°to 153°(c.m.) to accuracies between 0.003 and 0.006. The results are compared to previous n-d data at 14 MeV and ar ... Full text Cite

A linear voltage ramp generator for a three stage bunching system

Journal Article Nuclear Instruments and Methods · April 15, 1982 A circuit capable of modulating the energy of a beam oor use with a three-stage bunching system has been designed and tested. This circuit charges up the anode of a duoplasmatron ion source through a resistor and discharges it through high power FETs at re ... Full text Cite

NEUTRON ELASTIC AND INELASTIC SCATTERING CROSS SECTIONS FOR CARBON-13 BETWEEN 10 AND 18 Mev.

Journal Article Nuclear Science and Engineering · January 1, 1982 Fast neutron scattering cross sections have been measured for **1**3C. Angular distributions for elastic scattering over an angular range from 20 to 155 deg are presented for incident neutron energies of 9. 97, 11. 96, 13. 94, 15. 94, and 17. 92 Mev. Inela ... Full text Cite

Analyzing power measurements for (H2(npol,n)H2) scattering at 10 MeV compared to few-nucleon calculations and data for (H2(ppol,p)H2) scattering

Journal Article Physical Review Letters · January 1, 1982 The analyzing power Ay() for scattering of neutrons from deuterons at 10 MeV for 30°to 145°(c.m.) was measured to an accuracy better than 0.005. The results are compared to published p-d data at 10 MeV, and convincing differences are noted for the first ti ... Full text Cite

Analyzing powers for neutron elastic scattering at forward angles

Journal Article Physical Review C · January 1, 1982 Accurate neutron analyzing powers have been obtained using a new pulsed polarized neutron facility. Data are presented for elastic scattering of 14-MeV neutrons from Ca40, Fe54, Cu65, Sn120, and Pb208 between 18°and 36°. Our data exhibit no evidence for th ... Full text Cite

Spin-orbit deformations deduced from analyzing powers for inelastic neutron scattering from Fe54, Fe56, Ni58, Ni60, Sn120, and Pb208

Journal Article Physical Review C · January 1, 1982 Analyzing powers Ay() for inelastic scattering of 10-MeV neutrons to the first excited states of Fe54, Fe56, Ni58, Ni60, Sn120, and Pb208 have been measured at a few selected angles. These data were analyzed using a coupled channels code in which the full ... Full text Cite

SIMULTANEOUS MEASUREMENTS OF ANALYZING POWERS AND DIFFERENTIAL CROSS SECTIONS FOR n plus **2**8Si.

Journal Article IEEE Transactions on Nuclear Science · 1982 Scattering experiments conducted with beams of polarized neutrons give special information about the spin sensitive part of the neutron-nucleus interaction. Carefully controlled measurements of the analyzing power for the scattering of polarized neutron be ... Cite

ACCURATE FORWARD ANGLE MEASUREMENTS WITH POLAR NEUTRONS

Journal Article BULLETIN OF THE AMERICAN PHYSICAL SOCIETY · January 1, 1981 Link to item Cite

NEUTRON ELASTIC-SCATTERING FROM 1P-SHELL NUCLEI BETWEEN 10-15 MEV

Journal Article BULLETIN OF THE AMERICAN PHYSICAL SOCIETY · January 1, 1981 Link to item Cite