YRAST 4-QUASI-PARTICLE STATES IN W-182

Citation
Ph. Regan et al., YRAST 4-QUASI-PARTICLE STATES IN W-182, Nuclear physics. A, 567(2), 1994, pp. 414-430
Citations number
21
Categorie Soggetti
Physics, Nuclear
Journal title
ISSN journal
03759474
Volume
567
Issue
2
Year of publication
1994
Pages
414 - 430
Database
ISI
SICI code
0375-9474(1994)567:2<414:Y4SIW>2.0.ZU;2-R
Abstract
High-spin states of the stable isotope W-182 have been studied using t he reactions Yb-176(C-13, alpha 3n)W-182 and Yb-176(Be-9, 3n)W-182 at beam energies of 65 and 40 MeV, respectively. Three, possibly four, ne w intrinsic states at high spins have been observed corresponding to d ifferent high-K four-quasi-particle structures. The K-pi = 15(+) and 1 7(-) levels have lifetimes of 78(15) and 25(10) ns, respectively. Rota tional bands are observed built on the K-pi = 16(+) and 17(-) yrast st ates. The coupling of Nilsson orbitals which give rise to high-K state s at the yrast line and the K-forbiddenness of the K-pi = 15(+) isomer ic decay are discussed.