Evidence for Nontermination of Rotational Bands in 74Kr


Evidence for Nontermination of Rotational Bands in 74Kr

Valiente-Dobon, 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.

Three rotational bands in 74 Kr were studied up to (in one case one transition short of ) the maximum spin Imax of their respective single-particle configuratio ns. 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 .

Keywords: Nuclear structure; gamma-ray spectroscopy; mean-field calculations

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Publ.-Id: 7870