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DC Field | Value | Language |
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dc.contributor.author | Barranco, F. | cat |
dc.contributor.author | Bortignon, P. F. | cat |
dc.contributor.author | Broglia, R. A., 1939- | cat |
dc.contributor.author | Colò, G. | cat |
dc.contributor.author | Schuck, Peter | cat |
dc.contributor.author | Vigezzi, E. | cat |
dc.contributor.author | Viñas Gausí, Xavier | cat |
dc.date.accessioned | 2010-01-29T10:30:05Z | - |
dc.date.available | 2010-01-29T10:30:05Z | - |
dc.date.issued | 2005 | cat |
dc.identifier.issn | 0556-2813 | cat |
dc.identifier.uri | http://hdl.handle.net/2445/11018 | - |
dc.description.abstract | The dependence on the single-particle states of the pairing matrix elements of the Gogny force and of the bare low-momentum nucleon-nucleon potential v{sub low-k}--designed so as to reproduce the low-energy observables avoiding the use of a repulsive core--is studied for a typical finite, superfluid nucleus ({sup 120}Sn). It is found that the matrix elements of v{sub low-k} follow closely those of v{sub Gogny} on a wide range of energy values around the Fermi energy e{sub F}, those associated with v{sub low-k} being less attractive. This result explains the fact that around e{sub F} the pairing gap {delta}{sub Gogny} associated with the Gogny interaction (and with a density of single-particle levels corresponding to an effective k mass m{sub k}{approx_equal}0.7 m) is a factor of about 2 larger than {delta}{sub low-k}, being in agreement with {delta}{sub exp}=1.4 MeV. The exchange of low-lying collective surface vibrations among pairs of nucleons moving in time-reversal states gives rise to an induced pairing interaction v{sub ind} peaked at e{sub F}. The interaction (v{sub low-k}+v{sub ind}) Z{sub {omega}} arising from the renormalization of the bare nucleon-nucleon potential and of the single-particle motion ({omega}-mass and quasiparticle strength Z{sub {omega}}) associated with the particle-vibration coupling mechanism, leads to amore » value of the pairing gap at the Fermi energy {delta}{sub ren} that accounts for the experimental value. An important question that remains to be studied quantitatively is to what extent {delta}{sub Gogny}, which depends on average parameters, and {delta}{sub ren}, which explicitly depends on the parameters describing the (low-energy) nuclear structure, display or not a similar isotopic dependence and whether this dependence is borne out by the data. | - |
dc.format.extent | 11 p. | cat |
dc.format.mimetype | application/pdf | eng |
dc.language.iso | eng | eng |
dc.publisher | The American Physical Society | cat |
dc.relation.isformatof | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevC.72.054314 | cat |
dc.relation.ispartof | Physical Review C, 2005, vol. 72, núm. 5, p. 054314-1-054314-11 | cat |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevC.72.054314 | - |
dc.rights | (c) The American Physical Society, 2005 | cat |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Estructura nuclear | cat |
dc.subject.classification | Física nuclear | cat |
dc.subject.other | Nuclear structure | eng |
dc.subject.other | Nuclear physics | eng |
dc.title | Pairing matrix elements and pairing gaps with bare, effective and induced interactions | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 529384 | cat |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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529384.pdf | 274.84 kB | Adobe PDF | View/Open |
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