SPIN OBSERVABLES FOR THE PB-208(P,N)BI-208 REACTION AT 135 MEV

We measured the spin observables A(y), P, and S-NN' for the Pb-208(p,n )Bi-208 reaction at 135 MeV at laboratory angles of 0 degrees, 3 degre es, 6 degrees, and 9 degrees. The overall energy resolution was about 1 MeV. Data for S-NN' are compared with distorted-wave impulse-approxi mation calculations that use random-phase approximation wave functions . Comparisons are also made for the Ca-48(p,n)Sc-48 reaction. The agre ement between these calculations and the data is generally good, after adjustment of the nucleon-nucleon interaction in the random-phase app roximation calculations to place the 0(+) isobaric-analog states at th e correct excitation energies. A single adjustment of the nucleon-nucl eon force works for both target nuclei.