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Nuclear symmetry energy in relativistic mean field theory
KTH, School of Engineering Sciences (SCI), Physics.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
2006 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 633, no 2-3, 231-236 p.Article in journal (Refereed) Published
Abstract [en]

The physical origin of the nuclear symmetry energy is studied within the relativistic mean field (RMF) theory. Based on the nuclear binding energies calculated with and without mean isovector potential for several isobaric chains we confirm earlier Skyrme-Hartree-Fock result that the nuclear symmetry energy strength depends on the mean level spacing epsilon(A) and an effective mean isovector potential strength K(A). A detailed analysis of the isospin dependence of these two components contributing to the nuclear symmetry energy reveals a quadratic dependence due to the mean-isoscalar potential, similar to epsilon T-2, and, completely unexpectedly, the presence of a strong linear component similar to kappa T(T + 1 + epsilon/kappa) in the isovector potential. The latter generates a nuclear symmetry energy in RMF theory that is proportional to E-sym similar to T(T + 1) at variance to the non-relativistic calculation. The origin of the linear term in RMF theory needs to be further explored.

Place, publisher, year, edition, pages
2006. Vol. 633, no 2-3, 231-236 p.
Keyword [en]
relativistic mean field; nuclear symmetry energy; mean level density; isovector potential
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-7391DOI: 10.1016/j.physletb.2005.11.077ISI: 000235098500016Scopus ID: 2-s2.0-30944467234OAI: oai:DiVA.org:kth-7391DiVA: diva2:12405
Note
QC 20100623Available from: 2007-08-20 Created: 2007-08-20 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Investigation of effective interactions in relativistic mean field theory
Open this publication in new window or tab >>Investigation of effective interactions in relativistic mean field theory
2005 (English)Licentiate thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2005. 83 p.
Series
Trita-FYS, ISSN 0280-316X ; 2005:29
National Category
Subatomic Physics
Identifiers
urn:nbn:se:kth:diva-4074 (URN)91-7178-093-9 (ISBN)
Presentation
2005-07-07, , AlbaNova, Stockholm, 10:00
Note
QC 20101123Available from: 2006-08-17 Created: 2006-08-17 Last updated: 2010-11-23Bibliographically approved
2. Nuclear symmetry energy and neutron-proton pair correlations in microscopic mean field theory
Open this publication in new window or tab >>Nuclear symmetry energy and neutron-proton pair correlations in microscopic mean field theory
2007 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

A major task of nuclear structure theory is to develop an effective interaction that is capable to predict properties of nuclei under extreme conditions. In this thesis three different areas of effective interactions have been studied: i) the density dependence, which is of importance for the understanding of neutron stars and neutron rich nuclei; ii) the symmetry energy which governs the evolution of the binding energy with changing N/Z ratio; and iii) the neutron proton pairing energy. The symmetry energy governs the isospin dependent part of the nuclear interaction and determines basic properties of neutron stars. The isospin dependence of short range correlations are in turn important for properties of N ~ Z nuclei as well as symmetric nuclear matter.

Place, publisher, year, edition, pages
Stockholm: Fysik, 2007
Series
Trita-FYS, ISSN 0280-316X ; 2007:70
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-4469 (URN)978-91-7178-738-5 (ISBN)
Public defence
2007-08-24, Sal FA31, AlbaNova universitet centrum, Roslagstullsbacken 21, Stockholm, 11:00
Opponent
Supervisors
Note
QC 20100623Available from: 2007-08-20 Created: 2007-08-20 Last updated: 2010-07-15Bibliographically approved

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