High-spin rotational structures in Kr 76

• Published in: Physical review. C, Nuclear physics Vol. 71; no. 3
• Main Authors: Valiente-Dobón, J. J., Svensson, C. E., O'Leary, C. D., Ragnarsson, I., Andreoiu, C., Appelbe, D. E., Austin, R. A. E., Ball, G. C., Cameron, J. A., Carpenter, M. P., Clark, R. M., Cromaz, M., Dashdorj, D., Fallon, P., Finlay, P., Freeman, S. J., Garrett, P. E., Görgen, A., Grinyer, G. F., Hodgson, D. F., Hyland, B., Jenkins, D., Johnston-Theasby, F., Joshi, P., Kelsall, N. S., Macchiavelli, A. O., Moore, F., Mukherjee, G., Phillips, A. A., Reviol, W., Sarantites, D., Schumaker, M. A., Seweryniak, D., Smith, M. B., Waddington, J. C., Wadsworth, R., Ward, D., Williams, S. J.
• Format: Journal Article
• Language: English
• Published: 01-03-2005
• Subjects: Fysik; Natural Sciences; Naturvetenskap; Physical Sciences
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PhysRevC.71.034311

High-spin states in Kr-76(36)40 have been populated in the Ca-40(Ca-40,4p)Kr-76 fusion-evaporation reaction at abeam 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 Kr-76 have been extended to similar to 30 (h) over bar. Lifetime measurements. using the Doppler-shift attenuation method show that the transition quadrupole moment of these three bands decrease as they approach their maximum-spin states. Two signatures of a new rotational 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.