Pairing and Short-Range Correlations in Nuclear Systems

The structure and density dependence of the pairing gap in infinite matter is relevant for astrophysical phenomena and provides a starting point for the discussion of pairing properties in nuclear structure. Short-range correlations can significantly deplete the available single-particle strength ar...

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Bibliographic Details
Published in:Journal of low temperature physics 2017, Vol.189 (5-6), p.234-249
Main Authors: Rios, A., Polls, A., Dickhoff, W. H.
Format: Article
Language:English
Subjects:
ASTROPHYSICS
Channels
Characterization and Evaluation of Materials
Condensed Matter Physics
CORRELATIONS
DENSITY
FERMI LEVEL
Low temperature physics
Magnetic Materials
Magnetism
Neutrons
NUCLEAR MATTER
NUCLEAR PHYSICS
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR STRUCTURE
PAIRING INTERACTIONS
Physics
Physics and Astronomy
Reduction
THREE-BODY PROBLEM
TWO-BODY PROBLEM
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Summary:The structure and density dependence of the pairing gap in infinite matter is relevant for astrophysical phenomena and provides a starting point for the discussion of pairing properties in nuclear structure. Short-range correlations can significantly deplete the available single-particle strength around the Fermi surface and thus provide a reduction mechanism of the pairing gap. Here, we study this effect in the singlet and triplet channels of both neutron matter and symmetric nuclear matter. Our calculations use phase-shift equivalent interactions and chiral two-body and three-body interactions as a starting point. We find an unambiguous reduction of the gap in all channels with very small dependence on the NN force in the singlet neutron matter and the triplet nuclear matter channel. In the latter channel, SRC alone provide a 50% reduction of the pairing gap.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-017-1818-7