The elastic and inelastic scattering of 20–28 MeV polarized protons by carbon

Abstract

Measurements are presented of the polarization in proton-carbon scattering at incident energies of 20.2, 21.7, 22.6, 24.1, 26.2, 27.1 and 28.3 MeV (lab). Results cover the angular range 20°–160° (lab) for elastic scattering and inealastic scattering $\text{(Q = −4.43}\text{MeV}\text{from}{}^{12}\text{C}\text{)}$. The data show an irregular, non-monotonic variation with energy which is not characteristic of scattering by a complex potential. The addition of resonant compound elastic contribution from a few states, which has previously been shown to fit experimental cross sections in this energy range, does not improve the agreement with the present polarization results.