Neutron matter under strong magnetic fields: A comparison of models

The equation of state of neutron matter is affected by the presence of a magnetic field due to the intrinsic magnetic moment of the neutron. Here we study the equilibrium configuration of this system for a wide range of densities, temperatures, and magnetic fields. Special attention is paid to the b...

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Detalles Bibliográficos
Autores principales: Aguirre, Ricardo Miguel, Bauer, Eduardo, Vidaña, Isaac
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Exactas
Física
Astronomía
magnetic field
Physics
neutron matter
equilibrium configuration
densities
temperatures
isothermal compressibility
magnetic susceptibility
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126109
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126109
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Astronomía
magnetic field
Physics
neutron matter
equilibrium configuration
densities
temperatures
isothermal compressibility
magnetic susceptibility
spellingShingle Ciencias Exactas
Física
Astronomía
magnetic field
Physics
neutron matter
equilibrium configuration
densities
temperatures
isothermal compressibility
magnetic susceptibility
Aguirre, Ricardo Miguel
Bauer, Eduardo
Vidaña, Isaac
Neutron matter under strong magnetic fields: A comparison of models
topic_facet Ciencias Exactas
Física
Astronomía
magnetic field
Physics
neutron matter
equilibrium configuration
densities
temperatures
isothermal compressibility
magnetic susceptibility
description The equation of state of neutron matter is affected by the presence of a magnetic field due to the intrinsic magnetic moment of the neutron. Here we study the equilibrium configuration of this system for a wide range of densities, temperatures, and magnetic fields. Special attention is paid to the behavior of the isothermal compressibility and the magnetic susceptibility. Our calculation is performed using both microscopic and phenomenological approaches of the neutron matter equation of state, namely the Brueckner-Hartree-Fock (BHF) approach using the Argonne V18 nucleon-nucleon potential supplemented with the Urbana IX three-nucleon force, the effective Skyrme model in a Hartree-Fock description, and the quantum hadrodynamic formulation with a mean-field approximation. All these approaches predict a change from completely spin polarized to partially polarized matter that leads to a continuous equation of state. The compressibility and the magnetic susceptibility show characteristic behaviors which reflect that fact. Thermal effects tend to smear out the sharpness found for these quantities at T = 0. In most cases a thermal increase of ΔT = 10 MeV is enough to hide the signals of the change of polarization. The set of densities and magnetic field intensities for which the system changes it spin polarization is different for each model. However, we found that under the conditions examined in this work there is an overall agreement between the three theoretical descriptions.
format Articulo
Articulo
author Aguirre, Ricardo Miguel
Bauer, Eduardo
Vidaña, Isaac
author_facet Aguirre, Ricardo Miguel
Bauer, Eduardo
Vidaña, Isaac
author_sort Aguirre, Ricardo Miguel
title Neutron matter under strong magnetic fields: A comparison of models
title_short Neutron matter under strong magnetic fields: A comparison of models
title_full Neutron matter under strong magnetic fields: A comparison of models
title_fullStr Neutron matter under strong magnetic fields: A comparison of models
title_full_unstemmed Neutron matter under strong magnetic fields: A comparison of models
title_sort neutron matter under strong magnetic fields: a comparison of models
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/126109
work_keys_str_mv AT aguirrericardomiguel neutronmatterunderstrongmagneticfieldsacomparisonofmodels
AT bauereduardo neutronmatterunderstrongmagneticfieldsacomparisonofmodels
AT vidanaisaac neutronmatterunderstrongmagneticfieldsacomparisonofmodels
bdutipo_str Repositorios
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