High-spin states in172W,174W and176W studied by (16O, xn) reactions: decoupled quasiparticle bands and backbending
- 1 May 1978
- journal article
- Published by IOP Publishing in Journal of Physics G: Nuclear Physics
- Vol. 4 (5), 713-741
- https://doi.org/10.1088/0305-4616/4/5/008
Abstract
High-spin states in 172W, 174W and 176W have been studied using gamma -ray techniques following (16O, xn) reactions on enriched Dy targets. The ground-state band has been shown to backbend in 174W and 175W, but not in 172W. Side-bands are populated in each nucleus, with preferential population of an odd-spin sequence in each case. The decay properties of these bands, which have negative parity, suggest that they are due to the partial decoupling of a pair of quasi-particles by the Coriolis force. The properties of the bands are used to estimate in an empirical way the properties of a rotation-aligned (i132/)2 neutron band in order to predict the systematics of backbending due to bandcrossing.Keywords
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