Low-spin non-yrast states in light tungsten isotopes and the evolution of shape coexistence
✍ Scribed by T. Kibédi; G.D. Dracoulis; A.P. Byrne; P.M. Davidson
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 745 KB
- Volume
- 688
- Category
- Article
- ISSN
- 0375-9474
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✦ Synopsis
Excited states in 170 W, 172 W, 174 W, 176 W and 178 W have been populated in the β-decay of 170-178 Re isotopes and studied using γ -ray singles and coincidence techniques, utilising the high efficiency of a Compton-suppressed array, and conversion electron systems. Many new states at low excitation energies have been identified, complementing the level schemes previously established from in-beam studies. A large body of data on decay properties, spins and parities, and relative E2 and E0 matrix elements has been obtained. The properties of the K π = 0 + ("quasi"-β) and the K π = 2 + ("quasi"-γ ) bands are compared with similar bands observed in light osmium, platinum and mercury isotopes, where shape coexistence has been established at low spin.