Effects of exchange and final-state interactions in the reactions 2H( 3He, 3H p)p and 2H( 3He, 3He p)n

Abstract

Absolute coincidence cross sections for the 2H( 3He, 3He p)n and 2H( 3He, 3H p)p reactions were measured at E He = 35.9 MeV. Spectra dominated by the nucleon-nucleon final-state interaction (FSI) are fitted by a fully antisymmetrized PWBA theory which includes the effects of FSI in all its matrix elements. Previously reported 26.8 MeV data showing both FSI and quasi-elastic scattering (both with and without charge exchange) are also fitted by the theory, which qualitatively describes the shapes of all these spectra and the ratios of the cross sections for the various processes. Predictions of Watson-Migdal theory are fitted to the FSI spectra and differences between the two theories are analyzed.