P-A in the ⁴⁸Ca(p,n)⁴⁸Sc reaction at 135 MeV

The polarization (P) and the analyzing power (A) were measured for the ⁴⁸Ca(p,n)⁴⁸Sc reaction at 135 MeV. Of special interest is the difference (P-A) in these two quantities for the transitions to the two 1⁺ states at 2.52 and 16.8 MeV. Because of the difference in the predominant one-particle–one-hole configurations for these two states, viz., (f_7/2,f_7/2^-1) and (f_5/2,f_7/2^-1), respectively, qualitative differences in P-A are predicted based on nonlocal exchange contributions. The experimental results agree qualitatively with these predicted differences, but there are significant quantitative differences indicating that other effects contribute as well.