COUPLING OF THE GIANT-DIPOLE RESONANCE TO LOW-LYING OCTUPOLE MODES - GENERATOR-COORDINATE METHOD STUDY

Citation
Ph. Heenen et J. Skalski, COUPLING OF THE GIANT-DIPOLE RESONANCE TO LOW-LYING OCTUPOLE MODES - GENERATOR-COORDINATE METHOD STUDY, Physics letters. Section B, 381(1-3), 1996, pp. 12-16
Citations number
19
Categorie Soggetti
Physics
Journal title
ISSN journal
03702693
Volume
381
Issue
1-3
Year of publication
1996
Pages
12 - 16
Database
ISI
SICI code
0370-2693(1996)381:1-3<12:COTGRT>2.0.ZU;2-7
Abstract
The effect on the properties of low lying octupole modes of the coupli ng with the giant dipole resonance is studied within the Generator Coo rdinate Method. Results are presented for Sm-152 which is deformed in its ground state and for the superdeformed state of Hg-190. A basis is first generated by Hartree-Fock+BCS calculations with constraints on the octupole and dipole moments. The same Skyrme SkM effective intera ction used in the mean field is then diagonalised by the GCM. For the octupole K = 0 mode, the effect of the coupling is marginal and the di pole properties of low lying states are satisfactorily described by pu re octupole calculations. For the K = 1 mode, the dipole-octupole coup ling slightly reduces the E1 transition strength.