SPIN-DEPENDENT SCATTERING OF DEEPLY BOUND NUCLEONS

Exclusive measurements of the analyzing power and two spin-transfer ob servables for nucleon knockout from an O-16 target are presented, at k inematic conditions chosen to emphasize interactions in the nuclear in terior. The analyzing power data are substantially reduced in comparis on with values calculated in the distorted wave impulse approximation (DWIA) using the free nucleon-nucleon interaction, particularly for kn ockout of the deeply bound 1s(1/2) nucleons. Inclusion of density depe ndence for the interaction in the calculations improves the agreement with the data, but does not provide a satisfactory description for nuc leon knockout from O-16. Spin-orbit distortions are shown to strongly affect the DWIA predictions of the 1s(1/2) analyzing powers over most of the experimental kinematic range, but notably not near the points o f negligible recoil momentum. Hence these data offer constraints on th e optical potentials and independently on the two-body effective inter action.