High-spin collective structures in Pt-178 - art. no. 044323

Citation
Fg. Kondev et al., High-spin collective structures in Pt-178 - art. no. 044323, PHYS REV C, 6104(4), 2000, pp. 4323
Citations number
53
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
0556-2813 → ACNP
Volume
6104
Issue
4
Year of publication
2000
Database
ISI
SICI code
0556-2813(200004)6104:4<4323:HCSIP->2.0.ZU;2-#
Abstract
Collective structures in Pt-178 have been investigated with gamma-ray spect roscopic techniques following mass selection. The present data expand consi derably the level scheme of this nucleus. A new collective structure has be en identified and the known bands have been extended to higher spins. Firm spin and parity assignments have been made to many levels. Of particular in terest are the negative parity bands which are interpreted in terms of stru ctures associated with octupole vibrations crossed at moderate spin by two- quasiparticle excitations. The systematics of the alpha-decay reduced width s in Pt nuclei has also been investigated. The differences of a factor of a bout 2 between the widths for the odd- and the even-A isotopes is attribute d to changes in neutron pairing associated with the blocking effect. The tr end is reproduced in calculations based on the Lipkin-Nogami pairing model.