Cross-section measurements of neutron-induced reactions on GaAs using monoenergetic beams from 7.5 to 15 MeV

Abstract

Cross-section measurements for neutron-induced reactions on GaAs have been carried out at twelve different neutron energies from 7.5 to 15 MeV using the activation technique. The monoenergetic neutron beams were produced via the $^{2}\mathrm{H}$($d,n$)$^{3}\mathrm{He}$ reaction. GaAs samples were activated along with Au and Al monitor foils to determine the incident neutron flux. The activities induced by the reaction products were measured using high-resolution $\ensuremath{\gamma}$-ray spectroscopy. Cross sections for five reaction channels, viz., $^{69}\mathrm{Ga}$($n,2n$)$^{68}\mathrm{Ga}$, $^{69}\mathrm{Ga}$($n,p$)$^{69}\mathrm{Zn}$${}^{m}$, $^{71}\mathrm{Ga}$($n,p$)$^{71}\mathrm{Zn}$${}^{m}$, $^{75}\mathrm{As}$($n,2n$)$^{74}\mathrm{As}$, and $^{75}\mathrm{As}$($n,p$)$^{75}\mathrm{Ge}$, are reported. The results are compared with the previous measurements and available data evaluations. Statistical-model calculations, based on the Hauser-Feshbach formalism, have been carried out using the TALYS and the COH3 codes and are compared with the experimental results.