Pairing properties of realistic effective interactions

We investigate the pairing properties of an effective shell-model interaction defined within a model space outside 132Sn and derived by means of perturbation theory from the CD-Bonn free nucleon-nucleon potential. It turns out that the neutron pairing component of the effective interaction is signif...

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Published inEPJ Web of Conferences Vol. 107; p. 4001
Main Authors Gargano, A, Coraggio, L, Covello, A, Itaco, N
Format Journal Article Conference Proceeding
LanguageEnglish
Published Les Ulis EDP Sciences 01.01.2016
Subjects
Decomposition
Multipoles
Nuclei
Nuclei (nuclear physics)
Nucleon potential
Perturbation theory
Tin
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Summary:We investigate the pairing properties of an effective shell-model interaction defined within a model space outside 132Sn and derived by means of perturbation theory from the CD-Bonn free nucleon-nucleon potential. It turns out that the neutron pairing component of the effective interaction is significantly weaker than the proton one, which accounts for the large pairing gap difference observed in the two-valence identical particle nuclei 134Sn and 134Te. The role of the contribution arising from one particle-one hole excitations in determining the pairing force is discussed and its microscopic structure is also analyzed in terms of the multipole decomposition.
Bibliography:ObjectType-Article-1
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ISSN:2100-014X
2101-6275
2100-014X
DOI:10.1051/epjconf/201610704001