Abstract
Radiative neutron capture reaction was measured in the resolved resonance region for Gd targets with the Detector for Advanced Neutron Capture Experiments -ray calorimeter at the Los Alamos Neutron Science Center. The -ray energy spectra for different multiplicities were obtained for several -wave resonances in each nucleus. These spectra were analyzed within the extreme statistical model to provide unique information on the photon strength functions and especially on the scissors mode in odd Gd isotopes. The main result of this analysis is that in all nuclei scissors-mode resonances are built on excited levels and not only on their ground states. The strength of the mode found in Gd and Gd is comparable to the strength observed in well-deformed even-even Gd isotopes while it is substantially higher in Gd. The difference in observed strengths of the scissors mode indicates an existence of an even-odd effect in this quantity.
7 More- Received 27 June 2013
DOI:https://doi.org/10.1103/PhysRevC.88.034317
©2013 American Physical Society