Excited Superdeformed Band Research Articles

Superdeformed bands and their crossing features in Gd nuclei around A=146

Two discrete superdeformed bands have been found in 146Gd. The superdeformed yrast band has an average quadrupole moment of 12±2 eb and shows a band crossing with an alignment of ≈ at a rotational frequency of 0.65 MeV. No crossing has been observed for the excited superdeformed band. Configuration assignments are discussed for 146–148Gd considering (i) the crossing behaviour of the superdeformed bands and (ii) the existence of degenerate and average superdeformed bands. Arguments are given that the [651 1 2 ] and [642 5 2 ] single-particle states are involved in the band crossing.

An excited superdeformed band of 80Zr in Skyrme Hartree-Fock calculations

Both experiment and theory yield the result that the ground band of 80Zr is superdeformed with an axis ratio of approximately 3 2 . In this work excited bands are considered with Skyrme Hartree-Fock approach. Using the Skyrme 3 interaction an excited spherical state is calculated at an excitation energy of 8.6 MeV and an excited superdeformed band with an axis ratio of about 2 1 is obtained with a band-head energy of 8.5 MeV. Relative to the (excited) spherical state, the ground state band consists of a 12-particle-12-hole state and the excited deformed band consists of a 16-particle-16-hole excitation. Other topics such as the kinetic energy anomaly, the monopole shrinkage, and the Bertsch formula for deformation are discussed.