Isospin dependent pairing interactions and BCS-BEC crossover

H. Sagawa, J. Margueron, K. Hagino

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We propose new types of density dependent contact pairing interaction which reproduce the pairing gaps in symmetric and neutron matters obtained by a microscopic treatment based on the reahstic nucleon-nucleon interaction. The BCS-BEC crossover of neutrons pairs in symmetric and asymmetric nuclear matters is studied by using these contact interactions. It is shown that the bare and screened pairing interactions lead to different features of the BCS-BEC crossover in symmetric nuclear matter We perform Hartree-Fock-Bogoliubov (HFB) calculations for semi-magic Calcium, Nickel, Tin and Lead isotopes and N=20, 28, 50 and 82 isotones using these density-dependent pairing interactions. Our calculations well account for the experimental data for the neutron number dependence of binding energy, two neutrons separation energy, and odd-even mass staggering of these isotopes. Especially the interaction IS+IV Bare without the medium polarization effect gives satisfactory results for all the isotopes.

Original languageEnglish
Title of host publicationNuclear Physics and Astrophysics
Subtitle of host publicationFrom Stable Beams to Exotic Nuclei
EditorsAkif Baha Balantekin, Ismail Boztosun
PublisherAmerican Institute of Physics Inc.
Pages142-147
Number of pages6
ISBN (Print)9780735406032
DOIs
Publication statusPublished - 2008 Nov 11
EventInternational Conference on Nuclear Physics and Astrophysics: From Stable Beams to Exotic Nuclei 2008 - Cappadocia-Nevsehir, Turkey
Duration: 2008 Jun 252008 Jun 30

Publication series

NameAIP Conference Proceedings
Volume1072
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Conference on Nuclear Physics and Astrophysics: From Stable Beams to Exotic Nuclei 2008
CountryTurkey
CityCappadocia-Nevsehir
Period08/6/2508/6/30

Keywords

  • BCS-BEC crossover
  • Pairing correlations

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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