Neutron Drops and Skyrme Energy-Density Functionals

Neutron Drops and Skyrme Energy-Density Functionals

The J\(^{\pi}\)=0\(^+\) ground state of a drop of 8 neutrons and the lowest 1/2\(^-\) and 3/2\(^-\) states of 7-neutron drops, all in an external well, are computed accurately with variational and Green's function Monte Carlo methods for a Hamiltonian containing the Argonne \(v_{18}\) two-nucle...

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Veröffentlicht in:arXiv.org 1995-10
Hauptverfasser: Pudliner, B S, Smerzi, A, Carlson, J, Pandharipande, V R, Pieper, Steven C, Ravenhall, D G
Format: Artikel
Sprache:eng
Schlagworte:
Computer simulation
Density
Green's functions
Monte Carlo simulation
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Zusammenfassung:The J\(^{\pi}\)=0\(^+\) ground state of a drop of 8 neutrons and the lowest 1/2\(^-\) and 3/2\(^-\) states of 7-neutron drops, all in an external well, are computed accurately with variational and Green's function Monte Carlo methods for a Hamiltonian containing the Argonne \(v_{18}\) two-nucleon and Urbana IX three-nucleon potentials. These states are also calculated using Skyrme-type energy-density functionals. Commonly used functionals overestimate the central density of these drops and the spin-orbit splitting of 7-neutron drops. Improvements in the functionals are suggested.
ISSN:2331-8422
DOI:10.48550/arxiv.9510022