The triton energy spectra of the charge-exchange ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$${(}^3$He,t) reaction at 2 GeV beam energy are analyzed in the quasielastic nucleon knockout region. Considering that this region is mainly populated by the charge exchange of a proton in ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ with a neutron in the target nucleus and the final proton going in the continuum, the cross sections are written in the distorted-wave impulse approximation. The t matrix for the elementary exchange process is constructed in the distorted-wave Born approximation, using one-pion-plus-ρ-exchange potential for the spin-isospin nucleon-nucleon potential. This t matrix reproduces the experimental data on the elementary pn→np process. The calculated cross sections for the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$${(}^3$He,t) reaction at 2° to 7° triton emission angle are compared with the corresponding experimental data, and are found in reasonable overall accord. © 1996 The American Physical Society.

• Received 17 August 1995

DOI:https://doi.org/10.1103/PhysRevC.53.1851