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Title: np Pairing Correlations in Low-Density Region of Nuclear Matter

Abstract

In the framework of Green's function formalism at finite temperatures, superfluidity of nuclear matter with np pairing correlations is studied. It is shown that, at low densities, equations for the energy gap in the spectrum of quasiparticles and chemical potentials of protons and neutrons allow solutions with negative chemical potential, which corresponds to appearance of Bose-Einstein condensation of deuterons in the low-density region of nuclear matter. In this region, np pairing correlations survive even for large isospin asymmetry. Interaction between nucleons is described by the effective zero range force, developed to reproduce the energy gap in the isospin singlet pairing channel, calculated with the use of the Paris NN potential. The obtained results may be of importance for description of thermal properties of outer low-density regions of neutron stars.

Authors:
 [1];  [2];  [2]
  1. Kharkov Institute of Physics and Technology, Kharkov (Ukraine)
  2. Department of Physics and Center for Space Science and Technology, Ewha Womans University, Seoul (Korea, Republic of)
Publication Date:
OSTI Identifier:
20692650
Resource Type:
Journal Article
Journal Name:
Physics of Atomic Nuclei
Additional Journal Information:
Journal Volume: 67; Journal Issue: 10; Other Information: Translated from Yadernaya Fizika, ISSN 0044-0027, 67, 1867-1871 (No. 10, 2004); DOI: 10.1134/1.1811188; (c) 2004 MAIK ''Nauka / Interperiodica''; Country of input: International Atomic Energy Agency (IAEA); TN:; Journal ID: ISSN 1063-7788
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ASYMMETRY; BOSE-EINSTEIN CONDENSATION; CORRELATIONS; DENSITY; DEUTERONS; ENERGY GAP; ENERGY LEVELS; GREEN FUNCTION; ISOSPIN; NEUTRON STARS; NEUTRONS; NUCLEAR MATTER; NUCLEON-NUCLEON INTERACTIONS; NUCLEON-NUCLEON POTENTIAL; PAIRING INTERACTIONS; PROTONS; QUASI PARTICLES; SUPERFLUIDITY; THERMODYNAMIC PROPERTIES

Citation Formats

Isayev, A A, Bastrukov, S I, Center for High Energy Physics, Kyungpook National University, Daegu, Laboratory of Information Technologies, Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Yang, J, and Center for High Energy Physics, Kyungpook National University, Daegu. np Pairing Correlations in Low-Density Region of Nuclear Matter. United States: N. p., 2004. Web. doi:10.1134/1.1811188.
Isayev, A A, Bastrukov, S I, Center for High Energy Physics, Kyungpook National University, Daegu, Laboratory of Information Technologies, Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Yang, J, & Center for High Energy Physics, Kyungpook National University, Daegu. np Pairing Correlations in Low-Density Region of Nuclear Matter. United States. https://doi.org/10.1134/1.1811188
Isayev, A A, Bastrukov, S I, Center for High Energy Physics, Kyungpook National University, Daegu, Laboratory of Information Technologies, Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Yang, J, and Center for High Energy Physics, Kyungpook National University, Daegu. 2004. "np Pairing Correlations in Low-Density Region of Nuclear Matter". United States. https://doi.org/10.1134/1.1811188.
@article{osti_20692650,
title = {np Pairing Correlations in Low-Density Region of Nuclear Matter},
author = {Isayev, A A and Bastrukov, S I and Center for High Energy Physics, Kyungpook National University, Daegu and Laboratory of Information Technologies, Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980 and Yang, J and Center for High Energy Physics, Kyungpook National University, Daegu},
abstractNote = {In the framework of Green's function formalism at finite temperatures, superfluidity of nuclear matter with np pairing correlations is studied. It is shown that, at low densities, equations for the energy gap in the spectrum of quasiparticles and chemical potentials of protons and neutrons allow solutions with negative chemical potential, which corresponds to appearance of Bose-Einstein condensation of deuterons in the low-density region of nuclear matter. In this region, np pairing correlations survive even for large isospin asymmetry. Interaction between nucleons is described by the effective zero range force, developed to reproduce the energy gap in the isospin singlet pairing channel, calculated with the use of the Paris NN potential. The obtained results may be of importance for description of thermal properties of outer low-density regions of neutron stars.},
doi = {10.1134/1.1811188},
url = {https://www.osti.gov/biblio/20692650}, journal = {Physics of Atomic Nuclei},
issn = {1063-7788},
number = 10,
volume = 67,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 2004},
month = {Fri Oct 01 00:00:00 EDT 2004}
}