Excited states in W-170, W-172, W-174, W-176 and W-178 have been populated in the beta -decay of Re170-178 isotopes and studied using gamma -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-pi = 0(+) ("quasi"-beta) and the K-pi = 2(+) ("quasi"-gamma) bands are compared with similar bands observed in light osmium, platinum and mercury isotopes, where shape coexistence has been established at low spin. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 115]
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