Isospin-dependent pairing interaction from nuclear matter calculations

Journal Article · Thu Apr 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.044313· OSTI ID:21388922

Zhang, S S ^[1]; Cao, L G ^[2]; Lombardo, U ^[3]; Zhao, E G; Zhou, S G ^[4]

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1. School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191 (China)
2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China)
3. Universita' di Catania and LNS-INFN, Catania 95123 (Italy)
4. Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 (China)

The isospin dependence of the effective pairing interaction is discussed on the basis of the Bardeen, Cooper, and Schrieffer theory of superfluid asymmetric nuclear matter. It is shown that the energy gap, calculated within the mean field approximation in the range from symmetric nuclear matter to pure neutron matter, is not linearly dependent on the symmetry parameter owing to the nonlinear structure of the gap equation. Moreover, the construction of a zero-range effective pairing interaction compatible with the neutron and proton gaps in homogeneous matter is investigated, along with some recent proposals of isospin dependence tested on the nuclear data table.

• OSTI ID: 21388922
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 4; Other Information: DOI: 10.1103/PhysRevC.81.044313; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
ASYMMETRY
BCS THEORY
COMPUTERIZED SIMULATION
ENERGY GAP
EQUATIONS
ISOSPIN
MEAN-FIELD THEORY
NEUTRONS
NONLINEAR PROBLEMS
NUCLEAR MATTER
PAIRING INTERACTIONS
PROTONS
SUPERFLUIDITY
SYMMETRY
BARYONS
CALCULATION METHODS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
INTERACTIONS
MATTER
NUCLEONS
PARTICLE PROPERTIES
SIMULATION