Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

The gamma-ray strength function ( SF) in 80Se is an important parameter to estimate the neutron-capture cross section of 79Se which is one of the long-lived fission products (LLFPs). Until now, the SF method was applied for 80 Se only above the neutron-separation energy (Sn) and the evaluated 79 Se(n,gamma) cross section has an instability caused by the GSF below Sn . We studied the dipole-strength distribution of 80 Se in a photon-scattering experiment using bremsstrahlung produced by an electron beam of an energy of 11.5 MeV at the linear accelerator ELBE at HZDR. The present photoabsorption cross section of 80 Se was combined with results of (gamma,n) experiments and are compared with predictions usinmg the TALYS code. We also estimated the 79 Se(n,gamma) cross sections and compare them with TALYS predictions and earlier work by other groups.