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Evidence for nontermination of rotational bands in 74Kr |
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| Authors: | Valiente-Dobón J J Steinhardt T Svensson C E Afanasjev A V Ragnarsson I Andreoiu C Austin R A E Carpenter M P Dashdorj D de Angelis G Dönau F Eberth J Farnea E Freeman S J Gadea A Garrett P E Görgen A Grinyer G F Hyland B Jenkins D Johnston-Theasby F Joshi P Jungclaus A Lieb K P Macchiavelli A O Moore E F Mukherjee G Napoli D R Phillips A A Plettner C Reviol W Sarantites D Schnare H Schumaker M A Schwengner R Seweryniak D Smith M B Stefanescu I Thelen O Wadsworth R |
| Institution: | Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada. valiente@lnl.infn.it |
| Abstract: | Three rotational bands in 74Kr were studied up to (in one case one transition short of) the maximum spin I(max) of their respective single-particle configurations. Their lifetimes have been determined using the Doppler-shift attenuation method. The deduced transition quadrupole moments reveal a modest decrease, but far from a complete loss of collectivity at the maximum spin I(max). This feature, together with the results of mean field calculations, indicates that the observed bands do not terminate at I = I(max). |
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