Photon Strength Functions from Two-Step γ Cascades Experiment on 155,157Gd
1 North Carolina State University, Raleigh, NC - 27695, USA
2 Charles University in Prague, CZ-18000 Prague 8, Czech Republic
3 Nuclear Physics Institute, Czech Academy of Science, CZ-25068 Řež, Czech Republic
4 Triangle Universities Nuclear Laboratory, Durham, NC - 27708, USA
a e-mail: firstname.lastname@example.org
Published online: 28 May 2015
Spectra of two-step γ cascades following neutron capture in 155,157Gd were measured using the two- HPGe-detector facility installed at a pure subthermal neutron beam of the LVR-15 reactor in ˇež near Prague. The main objective of this experiment was to get new information on photon strength functions with the emphasis put on the role of M1 scissors mode vibration. An analysis of accumulated γ-ray spectra, made within the statistical model, leads to the conclusion that the scissors mode significantly affects γ decay of all states of studied nuclei. The obtained results for energy, damping width and summed B(M1) ↑ strength of the scissors mode are compared with what has been deduced from neutron capture experiments performed at DANCE detector installed in Los Alamos National Laboratory, NRF data for the ground state scissors mode and from the data on 3He-induced reactions using the so-called Oslo method.
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