Isomeric yield ratios for the Ag-nat(gamma,xn)Ag-106m,Ag-g;104m,Ag-g photonuclear reactions induced by 40-, 45-, 50-, 55-, and 60-MeV bremsstrahlung

We have determined the isomeric yield ratios for the isomeric pairs Ag-106m,Ag-g and Ag-104m,Ag-g produced on natural silver target nuclei in the bremstrahlung energy region from 40- to 60-MeV. The measurements were carried out by the activation method in combination with direct gamma-spectrometry. The necessary corrections were made to improve the accuracy of the experimental results. The present yield ratios measured at 40, 45, 50, 55, and 60 MeV for the Ag-106m,Ag-g isomeric pair are 0.019 +/- 0.002, 0.022 +/- 0.002, 0.023 +/- 0.002, 0.025 +/- 0.002, and 0.025 +/- 0.002, and those for the Ag-104m,Ag-g isomeric pair are 1.26 +/- 0.12, 1.34 +/- 0.12, 1.36 +/- 0.12, 1.43 +/- 0.12, and 1.49 +/- 0.12, respectively. The obtained results are compared with those existing in literature and discussed. (C) 2014 Elsevier B.V. All rights reserved.X1123sciescopu