Measurements of natCd(γ, x) reaction cross sections and isomer ratio of 115m,gCd with the bremsstrahlung end-point energies of 50 and 60 MeV

The flux-weighted average cross sections of Cd-nat(gamma, xn)Cd-115g,Cd-m,Cd-111m,Cd-109,Cd-107,Cd-105,Cd-104 and Cd-nat(gamma, x)Ag-113g,Ag-112,Ag-111g,Ag-110m reactions were measured at the bremsstrahlung end-point energies of 50 and 60 MeV. The activation and off-line gamma-ray spectrometric technique was carried out using the 100 MeV electron linear accelerator at the Pohang Accelerator Laboratory, Korea. The Cd-nat(gamma, xn) reaction cross sections as a function of photon energy were theoretically calculated using the TALYS-1.95 and the EMPIRE-3.2 Malta codes. Then, the flux-weighted average cross sections were obtained from the theoretical values of mono-energetic photons. These values were compared with the flux-weighted values from the present study and were found to be in general agreement. The measured experimental reaction cross-sections and integral yields were described for cadmium and silver isotopes in the Cd-nat(gamma, xn)Cd-115g,Cd-m,Cd-111m,Cd-109,Cd-107,Cd-105,Cd-104 and Cd-nat(gamma, x)Ag-113g,Ag-112,Ag-111g,Ag-110m reactions. The isomeric yield ratio (IR) of Cd-115g,Cd-m in the Cd-nat(gamma, xn) reaction was determined for the two bremsstrahlung end-point energies. The measured isomeric yield ratios of Cd-115g,Cd-m in the Cd-nat(gamma, xn) reaction were also compared with the theoretical values of the nuclear model codes and previously published literature data of the Cd-116(gamma, n) and Cd-116(n, 2n) reactions. It was found that the IR value increases with increasing projectile energy, which demonstrates the characteristic of excitation energy. However, the higher IR value of Cd-115g,Cd-m in the Cd-116(n, 2n) reaction compared to that in the Cd-116(gamma, n) reaction indicates the role of compound nuclear spin alongside excitation energy.