1304.7884 (Masakazu Toyokawa et al.)

Mass-number and isotope dependence of the local microscopic optical
potential for polarized proton scattering    [PDF]

Masakazu Toyokawa, Kosho Minomo, Masanobu Yahiro

We derive the local microscopic optical potential U systematically for polarized proton scattering at 65MeV, using the local-potential version of the Melbourne g-matrix folding model. As target nuclei, we take 6He and neutron-rich Ne isotopes in addition to stable nuclei of mass number A=4-208 in order to clarify A and isotope dependence of U. The local potential reproduces the experimental data systematically and has a geometry similar to the phenomenological optical potentials for stable targets. The target density is broadened by the weak-binding nature and/or the deformation in unstable nuclei. For the real part of the spin-orbit potential, the density broadening weakens the strength and enlarges the radius, whereas for the central potential it enlarges both the strength and the radius. The density-broadening effect is conspicuous for halo nuclei such as 6He and 31Ne. Similar discussion is made briefly for proton scattering at 200MeV.

View original: http://arxiv.org/abs/1304.7884