gamma-ray cascade transitions in Cd-112 and Cd-114 following resonance capture of epithermal neutrons
Abstract
Cascades of gamma-ray transitions in Cd-112 and Cd-114 have been studied in a neutron-capture experiment at the Los Alamos Neutron Science Center using a highly segmented and highly efficient gamma-ray calorimeter-Detector for Advanced Neutron Capture Experiments. Intensity distributions of two-, three-, and multifold coincidence gamma-ray transitions de-exciting resonances with known angular momenta and terminating at the ground state and at the first excited levels have been obtained.
The results are compared with statistical-model calculations using the code DICEBOX for the two theoretical models of electric-dipole photon-strength functions, the standard Lorentzian and the model of Kadmenskii, Markushev, and Furman. It has been found that a combination of the two models reproduces the data best.
Adding resonance structures, such as the scissors mode and the pygmy resonance, to the photon-strength function do not improve the description of the gamma-ray spectra.