ISOSCALAR AND ISOVECTOR DIPOLE MODE IN DRIP-LINE NUCLEI IN COMPARISONWITH BETA-STABLE NUCLEI

Citation
I. Hamamoto et al., ISOSCALAR AND ISOVECTOR DIPOLE MODE IN DRIP-LINE NUCLEI IN COMPARISONWITH BETA-STABLE NUCLEI, Physical review. C. Nuclear physics, 57(3), 1998, pp. 1064-1068
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Nuclear
Journal title
ISSN journal
0556-2813
Volume
57
Issue
3
Year of publication
1998
Pages
1064 - 1068
Database
ISI
SICI code
0556-2813(1998)57:3<1064:IAIDMI>2.0.ZU;2-9
Abstract
The isoscalar and the isovector dipole mode of drip line and beta-stab le nuclei are investigated, using the self-consistent Hartree-Fock plu s the random-phase approximation with Skyrme interactions. Including s imultaneously both the isoscalar and the isovector correlation, the RP A response function is estimated in the coordinate space so as to take into account properly the continuum effect. The spurious component is carefully taken away from the calculated strength. Ln beta-stable nuc lei such as Pb-208 the frequency of the isovector giant dipole resonan ce (IVGDR) is lower than that of the isoscalar giant dipole resonance (compression mode). In contrast, in lighter drip line nuclei a major p art of the isoscalar compression dipole strength lies at an energy muc h lower than the energy of the IVGDR.