INVESTIGATION OF (γ, xn)-REACTIONS ON NATURAL IRIDIUM AT 55 MeV BREMSSTRAHLUNG END-POINT ENERGY

The paper presents the results of a study of the flux-weighted average cross sections of Ir and Ir nuclei production in (γ, xn)-reactions under irradiation of a natural mixture of iridium isotopes by Bremsstrahlung with an end-point energy of 55 MeV. For the first time experimental data on the weighted average cross-sections of photoneutron reactions with the emission of up to 6 particles have been compared with theoretical weighted average cross-sections calculated in the framework of the Fermi model with a constant temperature and the Gogni–Hartree–Fock–Bogoliubov nuclear mass model using the TALYS1.96 software. It is demonstrated that the cross sections of the investigated reactions can be accurately described by the Fermi model with a constant temperature, which incorporates pre-equilibrium processes.