/sup 11/B(p, n)/sup 11/C(0) polarization-transfer measurement at 0degree and the effective two-nucleon interaction

The transverse polarization transfer coefficient, K/subv/ /suby//sup prime/(Odegree) has been measured for the reaction /sup 11/B(p,n)/sup 11/C(O) at E/subp/=16.3, 21.3, and 26.5 MeV. The results are not in agreement with direct-reaction-theory calculations using an empirical charge-exchange effective interaction which includes both central and tensor forces. (AIP)