Wobbling mode in Ta167

Authors :: Ludington, A.
McCutchan, E.A.
Ma, W.C.
Frauendorf, S.
Chiara, C.J.
Tandel, S.K.
Vanhoy, J.R.
Hartley, D.J.
Pifer, R.
Chowdhury, P.
Riedinger, L.L.
Tandel, U.
Mukhopadhyay, S.
Kondev, F.G.
Ijaz, Q.A.
Garg, U.
Seyfried, E.P.
Hamamoto, I.
Darby, I.G.
Janssens, R.V.F.
Wang, X.
Lakshmi, S.
Aguilar, A.
Zhu, S.
Lauritsen, T.
Riley, M.A.
Stefanescu, I.
Carpenter, M.P.
Publication Year :: 2009
Publisher :: American Physical Society, 2009.
Abstract: The collective wobbling mode, the strongest signature for the rotation of a triaxial nucleus, has previously been seen only in a few Lu isotopes in spite of extensive searches in nearby isotopes. A sequence of transitions in the N=94 Ta167 nucleus exhibiting features similar to those attributed to the wobbling bands in the Lu nuclei has now been found. This band feeds into the πi13/2 band at a relative energy similar to that seen in the established wobbling bands and its dynamic moment of inertia and alignment properties are nearly identical to the i13/2 structure over a significant frequency range. Given these characteristics, it is likely that the wobbling mode has been observed for the first time in a nucleus other than Lu, making this collective motion a more general phenomenon.