Observation of the lowest energy gamma-ray in any superdeformed nucleus : 196Bi

Prevost, A.; Rosse, B.; Meyer, M.; Redon, N.; Schmitt, C.; Stezowski, O.; Lautesse, P.; Astier, A.; Deloncle, I.; Porquet, M. -G.; Duguet, T.; Hubel, H.; Mergel, E.; Rossbach, D.; Nenoff, N.; Schonwasser, G.; Curien, D.; Duchene, G.; Gall, B. J. P.; Robin, J.; Vivien, J. P.

Observation of the lowest energy gamma-ray in any superdeformed nucleus : 196Bi

Authors

Description

New results on the superdeformed $^{196}$Bi nucleus a re reported. We have observed with the EUROBALL IV $γ$-ray spectrometer array a superdeformed trans ition of 124 keV which is the lowest observed energy $γ$-ray in any superdeformed nucleus. We have de velopped microscopic cranked Hartree-Fock-Bogoliubov calculations using the SLy4 effective force and a realistic surface p airing which strongly support the $K^π=2^-$($π$[651]1/2$\otimes ν$[752]5/2) assignment of this su perdeformed band.