Cross-section measurement for (n,2n) reaction induced by 14 MeV neutron on platinum isotopes

Abstract

Neutron induced the (n, 2n) reaction cross sections of platinum isotopes (190Pt, 192Pt, 196Pt and 198Pt) were well measured by the neutron activation and off-line gamma-ray technique around neutron energy of 14 MeV. During the irradiating time, the flux fluctuation of generating neutron was monitored by accompanying α-particle, while the cross section-ratio of 90Zr (n, 2n)89Zr to 93Nb(n, 2n)92mNb reactions were used to determine the neutron energies, which varied with the emission angle. As a result, the cross sections of 190Pt (n, 2n)189Pt, 192Pt (n, 2n)191Pt, 196Pt (n, 2n)195mPt, 198Pt (n, 2n)197mPt and 198Pt (n, 2n)197gPt reactions have been deduced at En = 14.1 ± 0.2 MeV, 14.5 ± 0.2 MeV and 14.7 ± 0.1 MeV, respectively. Meanwhile, the comparisons between this work and the literature date were given, as well as evaluated nuclear data and simulation data (ENDF/B-VIII.0, JEFF 3.3, ROSFOND-2010, JENDL/AD-2017 and Talys 1.9). The results shows an agreement with literature work as a whole, except the 196Pt (n, 2n)195mPt reaction.