High-spin level structure ofPt190andPt

Lifetimes of rotation-aligned states in190?193Pt

“…For 192pt a similar reduction of B(E2, 12+--* 10 § is predicted for a pure v i13/2 alignment [5]. In this case the available data [2,3] Figure 1). After completion of our measurements an investigation came to our attention, which partly overlaps with our work [6,7].…”

“…Two time spectra for 19~ are displayed in Figure 4. The long lived component in the time spectrum of the 167keV 7 --+5 transition results from the partial feeding of the 7 level via the 47 ns 10-isomer [2,3]. For the measurements in 192pt and ~93pt we used a natural Os target.…”

“…In addition in the even Pt isotopes the 7-branchings were taken into account in the following way: for the ratio I~(7 -~6+)/I~(7--+5 -) we used values of 0.66(5) and 0.17(2) for ~9~ and 192pt respectively, taken from I-2, 3]. In the decay of (8) 1617 (145) the 12 + states the branching to two l0 + states in t92pt and three 10 + states in 19~ had to be considered [2,3]. In 192pt the total intensity of the transition to the higher 10 + state at 2583keV can be derived from the coincidence spectrum with the 375keV 14+--.12 + transition.…”

“…Experimentally Hjorth et al find T1/2(12 +)< 1 ns which would still be in agreement with their calculation. On the other hand Cunnane et al [3] emphasize that also the (rCh~l~2) rotation-aligned configuration must be involved in these states. For the half-life of the 12 + level in tg~ they quote a value of ~l.5ns.…”

Triaxial deformation and nuclear shape transition in192Au

“…In the top panel of A backbending at similar frequencies and with similar alignment gain is observed throughout this region, e.g. for the neighboring doubly-odd 190−194 Hg [33] and 186−190 Au [17,34] and even-even 190,192 Pt [32,35,36]. In Fig.…”