HIGH-SPIN STATES IN W-172, W-174 AND W-176 STUDIED BY O-16, XN) REAC - DECOUPLED QUASI-PARTICLE BANDS AND BACKBENDING

被引：53
作者：
DRACOULIS, GD
WALKER, PM
JOHNSTON, A
机构：
[1] Dept. of Nuclear Phys., Australian Nat. Univ., Canberra, ACT
来源：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 1978年 / 4卷 / 05期
关键词：
D O I：
10.1088/0305-4616/4/5/008
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
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 (i 132/)2 neutron band in order to predict the systematics of backbending due to bandcrossing.
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页码：713 / 741
页数：29
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