Theoretical analysis of the double-differential cross-sections of neutron, proton, deuteron, 3He, and α for the p+6Li reaction

Based on the unified Hauser-Feshbach and exciton model, which can describe the particle emission processes between discrete energy levels with energy, angular momentum, and parity conservations, a statistical theory of light nucleus reaction (STLN) is developed to calculate the double-differential cross-sections of the outgoing neutron and light charged particles for the proton-induced Li-6 reaction. A significant difference is observed between the p+Li-6 and p+Li-7 reactions owing to the discrepancies in the energy-level structures of the targets. The reaction channels, including sequential and simultane-ous emission processes, are analyzed in detail. Taking the double-differential cross-sections of the outgoing proton as an example, the influence of contaminations (such as H-1, Li-7, C-12, and O-16) on the target is identified in terms of the kinetic energy of the first emitted particles. The optical potential parameters of the proton are obtained by fitting the elastic scatter-ing differential cross-sections. The calculated total double-differential cross-sections of the outgoing proton and deuteron at E-p=14 MeV agree well with the experimental data for different outgoing angles. Simultaneously, the mixed double dif-ferential cross-sections of He-3 and alpha are in good agreement with the measurements. The agreement between the measured data and calculated results indicates that the two-body and three-body breakup reactions need to be considered, and the pre-equilibrium reaction mechanism dominates the reaction processes. Based on the STLN model, a PLUNF code for the p+Li-6 reaction is developed to obtain an ENDF-6-formatted file of the double-differential cross-sections of the nucleon and light composite charged particles.