Speaker
Prof.
Kazuko Sugawara-Tanabe
(RIKEN)
Description
For the triaxially strongly deformed bands over odd-A Lu isotopes and 167Ta, we have made a quite good success in explaining both the energy level scheme and the strength of E2 and M1 transitions based on the top-on-top model with the angular momentum dependent moments of inertia, where the Coriolis coupling between the rotating core top and the single-particle top is explicitly considered. We extend this model to tops-on-top model where two nucleons occupying different orbitals coupled to a triaxially deformed core. We introduce three kinds of bosons, one related with the total angular momentum I and two with single-particle angular momenta j1 and j2. In the rough estimtion of B(E2) and B(M1), the transition from I to I-1 gains a factor of [(I-j1-j2)/I]^3 in contrast to [(I-j)/I]^3 in odd case. This makes the observation of the other partner band in even-A nucleus difficult. We have made a calculation on 164Lu, and in future we will apply to even-even nucleus.
Primary author
Prof.
Kazuko Sugawara-Tanabe
(RIKEN)
Co-authors
Kosai Tanabe
(RIKEN)
Naotaka Yoshinaga
(Saitama University)
