Two-Particle, Two-Hole States inK40from the Study of theAr40(He3,H3)K40Reaction

Abstract

Differential cross sections for the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}$(${}_{}{}^3{}_{}{}^{}\mathrm{He}$,${}_{}{}^3{}_{}{}^{}\mathrm{H}$)${}_{}{}^{40}{}_{}{}^{}\mathrm{K}$ reaction have been measured for a ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ bombarding energy of 17.9 MeV. A comparison is made between the ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ar}$(${}_{}{}^3{}_{}{}^{}\mathrm{He}$,${}_{}{}^3{}_{}{}^{}\mathrm{H}$)${}_{}{}^{40}{}_{}{}^{}\mathrm{K}$ data and the ${}_{}{}^{39}{}_{}{}^{}\mathrm{K}\mathrm{}(d,p)\mathrm{}{}_{}{}^{40}{}_{}{}^{}\mathrm{K}$ data of Enge et al. to determine the location of some of the two-particle, two-hole states in ${}_{}{}^{40}{}_{}{}^{}\mathrm{K}$. The angular distributions of 10 triton groups have been obtained. Distorted-wave Born-approximation (DWBA) calculations have been compared with some of these distributions to demonstrate the consistency of spin assignments.