Measurement of fast-neutron activation cross section of the Ag(n,2n)Ag reaction and its theoretical calculation of excitation function.

The cross section values of the Ag(n,2n)Ag reaction at four neutron energies 13.5, 14.1, 14.4 and 14.8 Me were measured relative to those of the monitor reaction Nb(n,2n)Nb by using the activation technique and using off-line γ-ray spectrometry. Fast neutrons were produced by the T(d,n)He reaction. The excitation function of this reaction in the neutron energies from the reaction threshold to 20 MeV was obtained based on the nuclear theoretical model program system TALYS-1.95 with the adjusted relevant parameters. The measured results were discussed and compared with the experimental data of literature, and the evaluated data from the evaluated libraries of TENDL-2021 and JEFF-3.1.2, as well as with the theoretical values based on TALYS-1.95.