Radii of neutron drops probed via the neutron skin thickness of nuclei

Zhao, P. W.; Gandolfi, S.

doi:10.1103/PhysRevC.94.041302

Title: Radii of neutron drops probed via the neutron skin thickness of nuclei

Journal Article · Mon Oct 10 00:00:00 EDT 2016 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.94.041302· OSTI ID:1340920

Zhao, P. W. ^[1]; Gandolfi, S. ^[2]

Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division

Multineutron systems are crucial to understanding the physics of neutron-rich nuclei and neutron stars. Neutron drops, neutrons confined in an external field, are investigated systematically in both nonrelativistic and relativistic density functional theories and with ab initio calculations. Here, we demonstrate a new strong linear correlation, which is universal in the realm of mean-field models, between the rms radii of neutron drops and the neutron skin thickness of ²⁰⁸ Pb and ⁴⁸Ca , i.e., the difference between the neutron and proton rms radii of a nucleus. This correlation can be used to deduce the radii of neutron drops from the measured neutron skin thickness in a model-independent way, and the radii obtained for neutron drops can provide a useful constraint for realistic three-neutron forces, due to its high quality. Furthermore, we present a new correlation between the slope L of the symmetry energy and the radii of neutron drops, and provide the first validation of such a correlation by using density-functional models and ab initio calculations. These newly established correlations, together with more precise measurements of the neutron skin thicknesses of ²⁰⁸ Pb and ⁴⁸ Ca and/or accurate determinations of L , will have an enduring impact on the understanding of multineutron interactions, neutron-rich nuclei, neutron stars, etc.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC). Nuclear Physics (NP) (SC-26); USDOE

Grant/Contract Number:: AC52-06NA25396; AC02-06CH11357; AC02-05CH11231

OSTI ID:: 1340920

Alternate ID(s):: OSTI ID: 1328574

Report Number(s):: LA-UR-16-22214; PRVCAN; TRN: US1701547

Journal Information:: Physical Review C, Vol. 94, Issue 4; ISSN 2469-9985

Publisher:: APSCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 28 works

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