Isomer yield ratios of photonuclear reactions at E_γmax 25 and 30 MeV

摘要

The study of isomer ratios, i. e., the relative probabilities of occupying isomer m and ground g levels of the final nucle- us in photonuclear reactions, makers it possible to determine the character of the spin dependence of the density of nuclear lev- els and to understand the reaction mechanisms better. In addition, data on the isomer yield ratios Y_m/Y_g are necessary for γ acti- vation analysis, which is one of the applied directions of nuclear physics. According to the data of [1], the reactions leading to the formation of isomer states of the final nuclei comprise ～40/100 of all cases which are of interest for this method of analysis.