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Résumé du preprint DAPNIA-05-35

DAPNIA-05-35
High-spin rotational structures in 76Kr
J.J. Valiente-Dobon, C.E. Svensson, C.D. O'Leary, I. Ragnarsson, C. Andreoiu, D.E. Appelbe, R.A.E. Austin, G.C. Ball, J.A. Cameron, M.P. Carpenter, R.M. Clark, M. Cromaz, D. Dashdorj, P. Fallon, P. Finlay, S.J. Freeman, P.E. Garret, A. Goergen, G.F. Grinyer, D.F. Hodgson, B. Hyland, D. Jenkins, F. Johnston-Theasby, P. Joshi, N.S. Kelsall, A.O. Macchiavelli, F. Moore, G. Mukherjee, A.A. Phillips, W. Reviol, D. Sarantites, M.A. Schumaker, D. Seweryniak, M.B. Smith, J.C. Waddington, R. Wadsworth, D. Ward, S.J. Williams
High-spin states in 76Kr have been populated in the 40Ca(40Ca,4p)76Kr fusion-evaporation reaction at a beam energy of 165 MeV and studied using the Gammasphere and Microball multidetector arrays. The ground-state band and two signature-split negative parity bands of 76Kr have been extended to ∼30h. Lifetime measurements using the Doppler-shift attenuation method show that the transition quadrupole moment of these three bands decrease as they approach theirmaximum-spin states. Two signatures of a newrotational structure with remarkably rigid rotational behavior have been identified. The high-spin properties of these rotational bands are analyzed within the framework of configuration-dependent cranked Nilsson-Strutinsky calculations.

DAPNIA-05-35

High-spin rotational structures in 76Kr

J.J. Valiente-Dobon, C.E. Svensson, C.D. O'Leary, I. Ragnarsson, C. Andreoiu, D.E. Appelbe, R.A.E. Austin, G.C. Ball, J.A. Cameron, M.P. Carpenter, R.M. Clark, M. Cromaz, D. Dashdorj, P. Fallon, P. Finlay, S.J. Freeman, P.E. Garret, A. Goergen, G.F. Grinyer, D.F. Hodgson, B. Hyland, D. Jenkins, F. Johnston-Theasby, P. Joshi, N.S. Kelsall, A.O. Macchiavelli, F. Moore, G. Mukherjee, A.A. Phillips, W. Reviol, D. Sarantites, M.A. Schumaker, D. Seweryniak, M.B. Smith, J.C. Waddington, R. Wadsworth, D. Ward, S.J. Williams

High-spin states in 76Kr have been populated in the 40Ca(40Ca,4p)76Kr fusion-evaporation reaction at a beam energy of 165 MeV and studied using the Gammasphere and Microball multidetector arrays. The ground-state band and two signature-split negative parity bands of 76Kr have been extended to ∼30h. Lifetime measurements using the Doppler-shift attenuation method show that the transition quadrupole moment of these three bands decrease as they approach theirmaximum-spin states. Two signatures of a newrotational structure with remarkably rigid rotational behavior have been identified. The high-spin properties of these rotational bands are analyzed within the framework of configuration-dependent cranked Nilsson-Strutinsky calculations.