Abstract
A superdeformed band has been observed in the N=80 nucleus which was produced with the reactions Cl,2p2n) and P,4n) at bombarding energies of 187 and 160 MeV, respectively. Since superdeformed bands also exist in the three lighter N=80 isotones , , and , it is now possible to understand the valence-proton configurations of these bands in a systematic way. The dynamic moment of inertia in shows no evidence for the N = 6 quasiproton crossing that is observed in . Comparison with cranked Woods-Saxon and total Routhian surface calculations suggests that the proton configuration in is ⊗[404 in which the quasiproton crossing is blocked. Furthermore, like and , there is no evidence in the T for the N=6 quasineutron crossing predicted by the calculations. This may indicate that static neutron pairing correlations are quenched at the N=80 superdeformed shell closure.
DOI:https://doi.org/10.1103/PhysRevC.50.R2261
©1994 American Physical Society