Calculations of $^{8}$He+p Elastic Cross Sections Using Microscopic Optical Potential

TL;DR

This paper develops a microscopic optical potential model combining folding and high-energy approximation methods to analyze $^{8}$He+p elastic scattering data across various energies, emphasizing the importance of surface absorption and spin-orbit effects.

Contribution

It introduces a combined microscopic optical potential approach for $^{8}$He+p scattering and examines the effects of different density models and potential components on scattering results.

Findings

The model successfully reproduces experimental differential cross sections.

Surface absorption significantly influences scattering at lower energies.

Spin-orbit potential effects are non-negligible in the analysis.

Abstract

An approach to calculate microscopic optical potential (OP) with the real part obtained by a folding procedure and with the imaginary part inherent in the high-energy approximation (HEA) is applied to study the $^8$He+p elastic scattering data at energies of tens of MeV/nucleon (MeV/N). The neutron and proton density distributions obtained in different models for $^{8}$He are utilized in the calculations of the differential cross sections. The role of the spin-orbit potential is studied. Comparison of the calculations with the available experimental data on the elastic scattering differential cross sections at beam energies of 15.7, 26.25, 32, 66 and 73 MeV/N is performed. The problem of the ambiguities of the depths of each component of the optical potential is considered by means of the imposed physical criterion related to the known behavior of the volume integrals as functions of the incident energy. It is shown also that the role of the surface absorption is rather important, in particular for the lowest incident energies (e.g., 15.7 and 26.25 MeV/nucleon).