np Pairing Correlations in Low-Density Region of Nuclear Matter
- Kharkov Institute of Physics and Technology, Kharkov (Ukraine)
- Department of Physics and Center for Space Science and Technology, Ewha Womans University, Seoul (Korea, Republic of)
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.
- OSTI ID:
- 20692650
- Journal Information:
- Physics of Atomic Nuclei, Vol. 67, 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:; ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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