Effect of Coulomb screening length on nuclear "pasta" simulations
We study the role of the effective Coulomb interaction strength and length on the dynamics of nucleons in conditions according to those in a neutron star's crust. Calculations were made with a semiclassical molecular dynamics model, studying isospin symmetric matter at subsaturation densities a...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_05562813_v89_n5_p_Alcain |
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todo:paper_05562813_v89_n5_p_Alcain2023-10-03T15:35:07Z Effect of Coulomb screening length on nuclear "pasta" simulations Alcain, P.N. Giménez Molinelli, P.A. Nichols, J.I. Dorso, C.O. We study the role of the effective Coulomb interaction strength and length on the dynamics of nucleons in conditions according to those in a neutron star's crust. Calculations were made with a semiclassical molecular dynamics model, studying isospin symmetric matter at subsaturation densities and low temperatures. The electrostatic interaction between protons is included as a screened Coulomb potential in the spirit of the Thomas-Fermi approximation, but the screening length is artificially varied to explore its effect on the formation of the nonhomogeneous nuclear structures known as "nuclear pasta." As the screening length increases, we can see a transition from a one-per-cell pasta regime (due exclusively to finite-size effects) to a more appealing multiple pasta per simulation box. This qualitative difference in the structure of neutron star matter at low temperatures shows that special caution should be taken when the screening length is estimated for numerical simulations. © 2014 American Physical Society. Fil:Dorso, C.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_05562813_v89_n5_p_Alcain |
| institution |
Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We study the role of the effective Coulomb interaction strength and length on the dynamics of nucleons in conditions according to those in a neutron star's crust. Calculations were made with a semiclassical molecular dynamics model, studying isospin symmetric matter at subsaturation densities and low temperatures. The electrostatic interaction between protons is included as a screened Coulomb potential in the spirit of the Thomas-Fermi approximation, but the screening length is artificially varied to explore its effect on the formation of the nonhomogeneous nuclear structures known as "nuclear pasta." As the screening length increases, we can see a transition from a one-per-cell pasta regime (due exclusively to finite-size effects) to a more appealing multiple pasta per simulation box. This qualitative difference in the structure of neutron star matter at low temperatures shows that special caution should be taken when the screening length is estimated for numerical simulations. © 2014 American Physical Society. |
| format |
JOUR |
| author |
Alcain, P.N. Giménez Molinelli, P.A. Nichols, J.I. Dorso, C.O. |
| spellingShingle |
Alcain, P.N. Giménez Molinelli, P.A. Nichols, J.I. Dorso, C.O. Effect of Coulomb screening length on nuclear "pasta" simulations |
| author_facet |
Alcain, P.N. Giménez Molinelli, P.A. Nichols, J.I. Dorso, C.O. |
| author_sort |
Alcain, P.N. |
| title |
Effect of Coulomb screening length on nuclear "pasta" simulations |
| title_short |
Effect of Coulomb screening length on nuclear "pasta" simulations |
| title_full |
Effect of Coulomb screening length on nuclear "pasta" simulations |
| title_fullStr |
Effect of Coulomb screening length on nuclear "pasta" simulations |
| title_full_unstemmed |
Effect of Coulomb screening length on nuclear "pasta" simulations |
| title_sort |
effect of coulomb screening length on nuclear "pasta" simulations |
| url |
http://hdl.handle.net/20.500.12110/paper_05562813_v89_n5_p_Alcain |
| work_keys_str_mv |
AT alcainpn effectofcoulombscreeninglengthonnuclearpastasimulations AT gimenezmolinellipa effectofcoulombscreeninglengthonnuclearpastasimulations AT nicholsji effectofcoulombscreeninglengthonnuclearpastasimulations AT dorsoco effectofcoulombscreeninglengthonnuclearpastasimulations |
| _version_ |
1807319587567435776 |