Using 12C as an example of a strongly deformed nucleus we calculate the strengths and energies in the asymptotic (oblate) deformed limit for the isovector twist mode operator [rY1l→]λ=2t+ where l→ is the orbital angular momentum. Whereas in a ΔN = 0 Nilsson model the summed strength is independent of the relative P3/2 and P1/2 occupancy when we allow for different frequencies ωi in the x, y, and z directions there is an enhancement of this strength due to deformation that is stronger than for the ordinary dipole mode but much weaker than for the scissors mode. At the same time, it is observed that there are considerable changes in the spectrum and that the strength is strongly fragmented amongst these disparate levels.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics