Measurement of isomeric ratios in ((gamma), n)-reactions for the barium isotopes in the giant dipole resonance region

摘要

The cross sections of ((gamma), n)-reactions in the range of the Giant Dipole Resonance, leading to the isomeric states h(sub 11/2) in odd isotopes of Ba with mass number A=129-137, are presented. An activation method of measurement has been used. The dependence of the isomeric ratio on (gamma)-energy and mass number of the isotopes has been obtained. Different factors influencing the value of the isomeric ratio are discussed. 18 refs., 7 figs., 2 tabs. (Atomindex citation 26:078412)