Two-particle spatial correlations in superfluid nuclei

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.034307· OSTI ID:21386673

Pillet, N; Berger, J -F ^[1]; Sandulescu, N ^[2]; Schuck, P ^[3]

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1. CEA/DAM/DIF, F-91297 Arpajon (France)
2. Institute of Physics and Nuclear Engineering, R-76900 Bucharest (Romania)
3. Institut de Physique Nucleaire, CNRS, UMR8608, F-91406 Orsay (France)

We discuss the effect of pairing on two-neutron space correlations in deformed nuclei. The spatial correlations are described by the pairing tensor in coordinate space calculated in the HFB approach. Calculations are done using the D1S Gogny force. We show that the pairing tensor has a rather small extension in the relative coordinate, a feature observed earlier in spherical nuclei. It is pointed out that in deformed nuclei the coherence length corresponding to the pairing tensor has a pattern similar to what we have found previously in spherical nuclei; that is, it is maximal in the interior of the nucleus and then it decreases rather rapidly in the surface region, where it reaches a minimal value of about 2 fm. This minimal value of the coherence length in the surface is essentially determined by the finite size properties of single-particle states in the vicinity of the chemical potential and has little to do with enhanced pairing correlations in the nuclear surface. It is shown that in nuclei the coherence length is not a good indicator of the intensity of pairing correlations. This feature is contrasted with the situation in infinite matter.

• OSTI ID: 21386673
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
COHERENCE LENGTH
COMPUTERIZED SIMULATION
CONFIGURATION
CORRELATIONS
DEFORMED NUCLEI
DIMENSIONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HARTREE-FOCK-BOGOLYUBOV THEORY
LENGTH
NEUTRONS
NUCLEI
NUCLEONS
SIMULATION
SPHERICAL CONFIGURATION
SUPERFLUIDITY
SURFACES