On isospin excitation energy

Citation
Wf. Li et al., On isospin excitation energy, HIGH EN P N, 25(7), 2001, pp. 668-673
Citations number
11
Language
CHINESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
ISSN journal
0254-3052 → ACNP
Volume
25
Issue
7
Year of publication
2001
Pages
668 - 673
Database
ISI
SICI code
0254-3052(200107)25:7<668:OIEE>2.0.ZU;2-S
Abstract
Within the framework of Hartree-Fock theory using the extended Skyrme effec tive interaction, the isospin excitation energy as a function of relative n eutron excess delta was investigated at different temperatures and densitie s. It was found that the isospin excitation energy decreased with the incre ment of temperature and/or the decrement of density. We pointed out that th e decrement of isospin excitation energy was resulted from the weakening of quantum effect with increment of temperature and/or decrement of density. Meanwhile, the relationship between the isospin excitation energy and the s ymmetry energy was discussed and found that the symmetry energy was just a part of the isospin excitation energy. With increasing temperature and decr easing density, the contribution of the symmetry energy to the isospin exci tation energy becomes more and more important. The isospin excitation energ y as a function of relative neutron excess was also investigated using diff erent potential parameters. The result shows that the isospin excitation en ergy is almost independent of the incompressibility and the effective mass, but strongly depends on the symmetry energy strength coefficient, which in dicates that it is possible to extract the symmetry energy of the nuclear e quation of state by investigating the isospin excitation energy in experime nts.