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We report measurements of the cross-section and a complete set ofpolarization transfer coefficients for the ${}^{3}{\rm He}(p,n)$ reaction at abombarding energy $T_p$ = 346 MeV and a reaction angle $\theta_{\rm lab}$ =$0^{\circ}$.  The data are compared with the corresponding free nucleon-nucleon values onthe 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 thedistribution is consistent with previous results obtained for the same reactionat $T_p$ = 48.8 MeV.

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