Measurement of isomeric yield ratios of the Ag-104m,Ag-g,Ag-106m,Ag-g in the 45-and 55-MeV bremsstrahlung induced reactions of natural silver

Abstract

The isomeric yield ratios for the Ag-nat(gamma,xn)Ag-104m,Ag-g,Ag-106m,Ag-g reactions with the end-point bremsstrahlung energies of 45- and 55-MeV have been determined by the off-line gamma-ray spectrometric technique using 100 MeV electron linac at Pohang accelerator laboratory, Korea. The present data were compared with literature data in comparable compound nucleus from the Ag-nat(gamma,xn), Pd-nat(p,xn), and Rh-103(alpha,xn) reactions to examine the effects of an excitation energy and an input angular momentum. It is observed that the isomeric yield ratios of Ag-104,Ag-106 in Ag-nat(gamma,xn), Pd-nat(p,xn) and Rh-103(alpha,xn) reactions increase with the end-point bremsstrahlung energy, proton and alpha energy, which indicate the role of excitation energy. It is also found that for the similar compound nucleus at same excitation energy, the isomeric yield ratio of Ag-104m,Ag-g is higher in the Pd-nat(p,xn) and Rh-103(alpha,xn) reactions than those in Ag-nat(gamma,xn) reaction, which indicate the effect of an input angular momentum.