Estimation of Direct- and Compound-Nuclear Reaction Cross-Sections in Al²⁷(p, p′)Al^27* in the Energy Range of 6.5 to 14 MeV

抄録

An attempt was tried to estimate the cross-sections of direct interactions and the compound nuclear process separately, using the experimental data of Al²⁷(p, p′)Al^27* scattering. Under three assumptions, 1) the similarity of the probability of direct collective excitations by alpha-particles and protons, 2) the 2J+1 rule for the yield of the compound nuclear process, and 3) a negligible effect of the interference between the both processes: the cross-sections of direct interactions, summed up the lower six proton groups, were estimated to be about 80 mb over the energy range of 8.5 to 14 MeV of incident protons. On the other hand, the compound part decreases exponentially from 140 mb to 30 mb in the same energy range.