Initial Research of np Scattering with Polarized Deuterium Target at ANKE/COSY

Abstract

The quasi-free np charge-exchange reaction [Formula: see text] has to be employed to extend the investigations of np scattering at ANKE to the highest energy available at COSY. As the proof-of-principle experiment, the initial research has been conducted at proton energy [Formula: see text] MeV using a polarized Deuterium target. The vector and tensor analyzing powers [Formula: see text] and [Formula: see text] were measured for momentum transfers [Formula: see text] MeV/c. These data connect smoothly with the previous measurements at [Formula: see text] MeV/c performed using a polarized deuteron beam. The reported data are well reproduced by the impulse approximation using the SAID np amplitudes. The results therefore proves that it is possible to continue the np programme at higher energies at ANKE.