"Low-energy shape oscillations of negative parity around the main and shape-isomeric minima in actinides "
Michal Kowal, IPJ
(id #120)
Seminar: NoPoster: Yes
Invited talk: No
We study low-energy shape oscillations of negative parity in the
first and second (isomeric) minima in actinides. As a main tool we
use the phenomenological Woods-Saxon potential with a variety of shape deformations. This allows to include a mixing of various multipolarities
when considering oscillations with a fixed K quantum number. The phonon
energies are determined either from the collective Hamiltonian with the
microscopic-macrocopic energy and cranking mass parameters, or from the
simplified version of it with the constant mass parameters. The results
for the first minima are in a reasonable agreement with experimental data,including predicted E1 transitions. As compared to the data in the second minimum of $^{240}$Pu, our K=1,2 energies are slightly overestimated while the K=0 energy is two times too large. This might signal a serious flaw of the model in the second minimum, but more data on the K=0 phonon are needed to decide if this is so.
first and second (isomeric) minima in actinides. As a main tool we
use the phenomenological Woods-Saxon potential with a variety of shape deformations. This allows to include a mixing of various multipolarities
when considering oscillations with a fixed K quantum number. The phonon
energies are determined either from the collective Hamiltonian with the
microscopic-macrocopic energy and cranking mass parameters, or from the
simplified version of it with the constant mass parameters. The results
for the first minima are in a reasonable agreement with experimental data,including predicted E1 transitions. As compared to the data in the second minimum of $^{240}$Pu, our K=1,2 energies are slightly overestimated while the K=0 energy is two times too large. This might signal a serious flaw of the model in the second minimum, but more data on the K=0 phonon are needed to decide if this is so.
