Quasi-Elastic Scattering in the Inclusive (${}^3$He, t) Reaction

Abstract

The triton energy spectra of the charge-exchange ${}^{12}$C(${}^3$He,t) reaction at 2 GeV beam energy are analyzed in the quasi-elastic nucleon knock-out region. Considering that this region is mainly populated by the charge-exchange of a proton in ${}^3$He with a neutron in the target nucleus and the final proton going in the continuum, the cross-sections are written in the distorted-wave impulse approximation. The t-matrix for the elementary exchange process is constructed in the DWBA, using one pion- plus rho-exchange potential for the spin-isospin nucleon- nucleon potential. This t-matrix reproduces the experimental data on the elementary pn $\to$np process. The calculated cross-sections for the ${}^{12}$C(${}^3$He,t) reaction at $2^o$ to $7^o$ triton emission angle are compared with the corresponding experimental data, and are found in reasonable overall accord.

Comments: 19 pages, latex, 11 postscript figures available at Kelkar@lnf.infn.it, submitted to Phy.Rev.C