Crossing of shears bands in Pb-197: B(M1) values and semiclassical description - art. no. 132503

Citation
Jr. Cooper et al., Crossing of shears bands in Pb-197: B(M1) values and semiclassical description - art. no. 132503, PHYS REV L, 8713(13), 2001, pp. 2503
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
8713
Issue
13
Year of publication
2001
Database
ISI
SICI code
0031-9007(20010924)8713:13<2503:COSBIP>2.0.ZU;2-B
Abstract
Subpicosccond lifetimes of states in shears band 1 in Pb-197 were measured by means of the recoil distance method employing Gammasphere and the New Ya le Plunger Device. The extracted reduced matrix elements, B(M1), show a cle ar sensitivity to the crossing of different shears configurations reflectin g the closing and reopening of the shears blades. The energies and B(Ml) va lues in the band crossing region are successfully described in the framewor k of the semiclassical model of the shears bands. The relevance of core rot ation contributions are shown. The results point to the existence of shears states with an angular momentum coupling angle larger than 90 degrees.