C. Glashausser

An optical-model analysis of 18.6 MeV proton elastic scattering

Abstract The differential cross sections and polarizations for the elastic scattering of 18.6 MeV protons from the nuclei 48 Ti, 50 Ti, 52 Cr, 54 Fe, 56 Fe, 58 Ni, 62 Ni, 63 Cu and 64 Ni have been analysed in terms of the optical model. Other sets of polarization measurements at 16.5 MeV on 52 Cr, 60 Ni and 62 Ni are also presented. Results cover the angular range 20–150°. A single set of geometrical parameters give good fits to all experimental data. The radius of the spin-orbit potential is smaller by about 10% than that of the central potential. It is verified that the introduction of a volume absorption strength does not improve the fits. The symmetry or ( N  Z )/ A dependence may be ascribed either to the real well depth or to the imaginary part of the potential.

Coupled-channels analysis of 800 MeV polarized proton inelastic scattering from 18O

Abstract Differential cross sections and analyzing powers have been measured for the 18O ( p , p′) 18O reaction at 800 MeV. A coupled-channels analysis of the 01+, 21+, and 42+ data yields good agreement with a rotational model description with a large β4 deformation. The effects of channel coupling are large. The angular distributions of Ay are reproduced well only with a full Thomas spin-orbit deformation approximately equal to the central deformation.