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Title: Bulk and isospin instabilities in hot nuclear matter

Publication Date:
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Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 95; Journal Issue: 5; Related Information: CHORUS Timestamp: 2017-05-16 22:12:16; Journal ID: ISSN 2469-9985
American Physical Society
Country of Publication:
United States

Citation Formats

Kolomietz, V. M., and Shlomo, S.. Bulk and isospin instabilities in hot nuclear matter. United States: N. p., 2017. Web. doi:10.1103/PhysRevC.95.054613.
Kolomietz, V. M., & Shlomo, S.. Bulk and isospin instabilities in hot nuclear matter. United States. doi:10.1103/PhysRevC.95.054613.
Kolomietz, V. M., and Shlomo, S.. Tue . "Bulk and isospin instabilities in hot nuclear matter". United States. doi:10.1103/PhysRevC.95.054613.
title = {Bulk and isospin instabilities in hot nuclear matter},
author = {Kolomietz, V. M. and Shlomo, S.},
abstractNote = {},
doi = {10.1103/PhysRevC.95.054613},
journal = {Physical Review C},
number = 5,
volume = 95,
place = {United States},
year = {Tue May 16 00:00:00 EDT 2017},
month = {Tue May 16 00:00:00 EDT 2017}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevC.95.054613

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  • We apply the variational theory for fermions at finite temperature and high density, developed in an earlier paper, to symmetric nuclear matter and pure neutron matter. This extension generalizes to finite temperatures, the many body technique used in the construction of the zero temperature Akmal-Pandharipande-Ravenhall equation of state. We discuss how the formalism can be used for practical calculations of hot dense matter. Neutral pion condensation along with the associated isovector spin longitudinal sum rule is analyzed. The equation of state is calculated for temperatures less than 30 MeV and densities less than three times the saturation density of nuclearmore » matter. The behavior of the nucleon effective mass in medium is also discussed.« less
  • Self-consistent mean-field methods based on phenomenological Skyrme effective interactions are known to exhibit spurious spin and spin-isospin instabilities both at zero and finite temperatures when applied to homogeneous nuclear matter at the densities encountered in neutron stars and in supernova cores. The origin of these instabilities is revisited in the framework of the nuclear energy density functional theory, and a simple prescription is proposed to remove them. The stability of several Skyrme parametrizations is reexamined.
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  • Direct URCA processes, occurring in neutron-star matter with a proton fraction exceeding the critical value of (11--15)%, can strongly enhance the bulk viscosity of the matter.