Skip to main content
Journal cover image

E1 and M1 strength functions at low energy

Publication ,  Conference
Schwengner, R; Massarczyk, R; Bemmerer, D; Beyer, R; Junghans, AR; Kögler, T; Rusev, G; Tonchev, AP; Tornow, W; Wagner, A
Published in: EPJ Web of Conferences
September 13, 2017

We report photon-scattering experiments using bremsstrahlung at the γELBE facility of Helmholtz-Zentrum Dresden-Rossendorf and using quasi-monoenergetic, polarized γ beams at the HIγS facility of the Triangle Universities Nuclear Laboratory in Durham. To deduce the photoabsorption cross sections at high excitation energy and high level density, unresolved strength in the quasicontinuum of nuclear states has been taken into account. In the analysis of the spectra measured by using bremsstrahlung at γELBE, we perform simulations of statistical γ-ray cascades using the code γDEX to estimate intensities of inelastic transitions to low-lying excited states. Simulated average branching ratios are compared with model-independent branching ratios obtained from spectra measured by using monoenergetic γ beams at HIγS. E1 strength in the energy region of the pygmy dipole resonance is discussed in nuclei around mass 90 and in xenon isotopes. M1 strength in the region of the spin-flip resonance is also considered for xenon isotopes. The dipole strength function of 74Ge deduced from γELBE experiments is compared with the one obtained from experiments at the Oslo Cyclotron Laboratory. The low-energy upbend seen in the Oslo data is interpreted as M1 strength on the basis of shell-model calculations.

Duke Scholars

Published In

EPJ Web of Conferences

DOI

EISSN

2100-014X

ISSN

2101-6275

ISBN

9782759890200

Publication Date

September 13, 2017

Volume

146

Related Subject Headings

  • 5110 Synchrotrons and accelerators
  • 5107 Particle and high energy physics
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Schwengner, R., Massarczyk, R., Bemmerer, D., Beyer, R., Junghans, A. R., Kögler, T., … Wagner, A. (2017). E1 and M1 strength functions at low energy. In EPJ Web of Conferences (Vol. 146). https://doi.org/10.1051/epjconf/201714605001
Schwengner, R., R. Massarczyk, D. Bemmerer, R. Beyer, A. R. Junghans, T. Kögler, G. Rusev, A. P. Tonchev, W. Tornow, and A. Wagner. “E1 and M1 strength functions at low energy.” In EPJ Web of Conferences, Vol. 146, 2017. https://doi.org/10.1051/epjconf/201714605001.
Schwengner R, Massarczyk R, Bemmerer D, Beyer R, Junghans AR, Kögler T, et al. E1 and M1 strength functions at low energy. In: EPJ Web of Conferences. 2017.
Schwengner, R., et al. “E1 and M1 strength functions at low energy.” EPJ Web of Conferences, vol. 146, 2017. Scopus, doi:10.1051/epjconf/201714605001.
Schwengner R, Massarczyk R, Bemmerer D, Beyer R, Junghans AR, Kögler T, Rusev G, Tonchev AP, Tornow W, Wagner A. E1 and M1 strength functions at low energy. EPJ Web of Conferences. 2017.
Journal cover image

Published In

EPJ Web of Conferences

DOI

EISSN

2100-014X

ISSN

2101-6275

ISBN

9782759890200

Publication Date

September 13, 2017

Volume

146

Related Subject Headings

  • 5110 Synchrotrons and accelerators
  • 5107 Particle and high energy physics