Photonuclear reactions natNi(γ,xn)57Ni and natNi(γ,xn)56Ni in the energy range Eγmax = 35–94 MeV

Abstract

The total bremsstrahlung flux-averaged cross-sections 〈σ(Eγmax)〉 for the photonuclear reactions natNi(γ,xn)57Ni and natNi(γ,xn)56Ni have been measured in the range of end-point energies Eγmax = 35–94 MeV. The experiments were performed with the beam from the NSC KIPT electron linear accelerator LUE-40 with the use of the activation and off-line γ-ray spectrometric technique. The calculation of the flux-average cross-sections 〈σ(Eγmax)〉th was carried out using the partial cross-section values σ(E) computed with the TALYS1.95 code for the level density models LD1-6 and bremsstrahlung γ-flux calculated by GEANT4.9.2. The obtained experimental results are compared both with the theoretical calculation 〈σ(Eγmax)〉th and with the data available in the literature. The obtained 〈σ(Eγmax)〉 values expand the energy range of previously known experimental data.