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arxiv: nucl-ex/0410023 · v1 · submitted 2004-10-18 · ⚛️ nucl-ex

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

A. Prevost (CSNSM , Ipnl) , B. Rosse (IPNL) , M. Meyer (IPNL) , N. Redon (IPNL) , C. Schmitt (IPNL) , O. Stezowski (IPNL) , P. Lautesse (IPNL)
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A. Astier (CSNSM) I. Deloncle (CSNSM) M.-G. Porquet (CSNSM) T. Duguet (ANL) H. Hubel (ISK) E. Mergel (ISK) D. Rossbach (ISK) N. Nenoff (ISK) G. Schonwasser (ISK) D. Curien (IReS) G. Duchene (IReS) B.J.P. Gall (IReS) J. Robin (IReS) J.P. Vivien (IReS)
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keywords superdeformednucleusenergygammalowestobservedairingarray
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New results on the superdeformed $^{196}$Bi nucleus a re reported. We have observed with the EUROBALL IV $\gamma$-ray spectrometer array a superdeformed trans ition of 124 keV which is the lowest observed energy $\gamma$-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 $K^\pi=2^-$($\pi$[651]1/2$\otimes \nu$[752]5/2) assignment of this su perdeformed band.

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