Dispersive optical model analysis of 208Pb generating a neutron-skin prediction beyond the mean field

Atkinson, M. C.; Mahzoon, M. H.; Keim, M. A.; Bordelon, B. A.; Pruitt, C. D.; Charity, R. J.; Dickhoff, W. H.

doi:10.1103/physrevc.101.044303

Title: Dispersive optical model analysis of ²⁰⁸Pb generating a neutron-skin prediction beyond the mean field

Journal Article · Thu Apr 09 00:00:00 EDT 2020 · Physical Review C

DOI:https://doi.org/10.1103/physrevc.101.044303· OSTI ID:1800650

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TRIUMF, Vancouver, BC (Canada); Washington Univ., St. Louis, MO (United States)
Washington Univ., St. Louis, MO (United States)

In this work, a nonlocal dispersive optical model analysis is carried out for neutrons and protons in ²⁰⁸Pb. Elastic-scattering angular distributions, total and reaction cross sections, single-particle energies, neutron and proton numbers, the charge distribution, and the binding energy are fitted to extract the neutron and proton self-energies both above and below the Fermi energy. From the single-particle propagator derived from these self-energies, we determine the charge and matter distributions in ²⁰⁸Pb. The predicted spectroscopic factors are consistent with results from the ($$\textit{e,e}'\textit{p}$$) reaction and inelastic-electron-scattering data to very high-spin states. Sensible results for the high-momentum content of neutrons and protons are obtained, with protons appearing more correlated, in agreement with experiment and ab initio calculations of asymmetric matter. A neutron skin of 0.25 ± 0.05 fm is deduced. An analysis of several nuclei leads to the conclusion that finite-size effects play a nonnegligible role in the formation of the neutron skin in finite nuclei.

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Research Organization:: Washington Univ., St. Louis, MO (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)

Grant/Contract Number:: FG02-87ER40316; PHY-1613362; PHY-1912643; FG02-87ER-40316

OSTI ID:: 1800650

Alternate ID(s):: OSTI ID: 1632941

Journal Information:: Physical Review C, Vol. 101, Issue 4; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 24 works

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