Measurement of isomeric-yield ratios of Pd-109m,Pd-g and Cd-115m,Cd-g with 50-, 60-, and 70-MeV bremsstrahlung

Abstract

The isomeric-yield ratios of Pd-109m,Pd-g and Cd-115m,Cd-g were measured by the activation method with uncollimated bremsstrahlung beams of 50-, 60-, and 70-MeV generated from an electron linear accelerator at Pohang Accelerator Laboratory. The induced activities in the irradiated foils were measured by the high-resolution gamma-ray spectrometric system consisting of a high-purity germanium detector and a multichannel analyzer. The obtained isomeric-yield ratios in the formation of Pd-109m,Pd-g and Cd-115m,Cd-g are compared with the corresponding values found in the other experiments and the calculated values based on the statistical model code TALYS. The present results for Pd-109m,Pd-g and Cd-115m,Cd-g in this energy region are the first measurement. (C) 2012 Elsevier B.V. All rights reserved.