Complete set of polarization transfer coefficients for the ${}^3\mathrm{He}(p,n)$ reaction at 346 MeV and 0 degrees

Abstract

We report measurements of the cross-section and a complete set of polarization transfer coefficients for the ${}^3\mathrm{He}(p,n)$ reaction at a bombarding energy $T_p$ = 346 MeV and a reaction angle $\hat{I}{¸}_{\mathrm{lab}}$ = $0^{\circ }$. The data are compared with the corresponding free nucleon-nucleon values on the basis of the predominance of quasi-elastic scattering processes. Significant discrepancies have been observed in the polarization transfer $D_{LL}(0^{\circ })$, which are presumably the result of the three-proton $T$ = 3/2 resonance. The spin--parity of the resonance is estimated to be $1/2^{-}$, and the distribution is consistent with previous results obtained for the same reaction at $T_p$ = 48.8 MeV.

4 figures, Accepted for publication in Physical Review C