Evidence for nontermination of rotational bands in Kr74

J. J. Valiente-Dobón, T. Steinhardt, C. E. Svensson, A. V. Afanasjev, I. Ragnarsson, C. Andreoiu, R. A E Austin, M. P. Carpenter, D. Dashdorj, G. De Angelis, F. Dönau, J. Eberth, E. Farnea, S. J. Freeman, A. Gadea, P. E. Garrett, A. Görgen, G. F. Grinyer, B. Hyland, D. JenkinsF. Johnston-Theasby, P. Joshi, A. Jungclaus, K. P. Lieb, A. O. MacChiavelli, E. F. Moore, G. Mukherjee, D. R. Napoli, A. A. Phillips, C. Plettner, W. Reviol, D. Sarantites, H. Schnare, M. A. Schumaker, R. Schwengner, D. Seweryniak, M. B. Smith, I. Stefanescu, O. Thelen, R. Wadsworth

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    Three rotational bands in Kr74 were studied up to (in one case one transition short of) the maximum spin Imax 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 Imax. This feature, together with the results of mean field calculations, indicates that the observed bands do not terminate at I=Imax. © 2005 The American Physical Society.
    Original languageEnglish
    Article number232501
    JournalPhysical Review Letters
    Issue number23
    Publication statusPublished - 2 Dec 2005


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