3 years ago

The neutron skin thickness of $^{48}$Ca from a nonlocal-dispersive-optical-model analysis.

R.J. Charity, M.H. Mahzoon, W.H. Dickhoff, M.C. Atkinson

A nonlocal dispersive-optical-model analysis has been carried out for neutrons and protons in $^{48}$Ca. Elastic-scattering angular distributions, total and reaction cross sections, single-particle energies, the neutron and proton numbers, and the charge distribution have been fitted to extract the neutron and proton self-energies both above and below the Fermi energy. From the single-particle propagator resulting from these self-energies we have determined the charge and neutron matter distributions in $^{48}$Ca. A neutron skin of 0.249$\pm$0.023~fm is deduced. The energy dependence of the total neutron cross sections is shown to have strong sensitivity to the skin thickness.

Publisher URL: http://arxiv.org/abs/1704.06719

DOI: arXiv:1704.06719v2

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