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New Band Structures and an Unpaired Crossing in 78Kr

Sun, H.; Doring, J.; Johns, G. D.; Kaye, R. A.; Solomon, G. Z.; Tabor, S. L.; Devlin, M.; LaFosse, D. R.; Lerma, F. and Sarantites, D. G., et al. (1999) In Physical Review C (Nuclear Physics) 59(2). p.655-664
Abstract
High-spin states in Kr-78 were studied using the Ni-58(Na-23,3p) reaction at 70 MeV and the Ni-58(Si-23,alpha 4p) reaction at 130 MeV. Prompt gamma-gamma coincidences were measured using the Pitt-FSU detector array and the GAMMASPHERE-MICROBALL array. Results from these experiments have led to 26 new excitation levels, some of which have been grouped into 3 new bands. Spins were assigned based on directional correlations of oriented nuclei. Two of the new negative-parity bands appear to form a signature-partner pair based on a two-quasineutron structure, in contrast to the previously known two-quasiproton negative-parity bands. A forking has been observed at the 24(+) state in the yrast band, which calculations suggest may result from an... (More)
High-spin states in Kr-78 were studied using the Ni-58(Na-23,3p) reaction at 70 MeV and the Ni-58(Si-23,alpha 4p) reaction at 130 MeV. Prompt gamma-gamma coincidences were measured using the Pitt-FSU detector array and the GAMMASPHERE-MICROBALL array. Results from these experiments have led to 26 new excitation levels, some of which have been grouped into 3 new bands. Spins were assigned based on directional correlations of oriented nuclei. Two of the new negative-parity bands appear to form a signature-partner pair based on a two-quasineutron structure, in contrast to the previously known two-quasiproton negative-parity bands. A forking has been observed at the 24(+) state in the yrast band, which calculations suggest may result from an unpaired crossing. The available evidence suggests oblate shapes in the yrast band coexist with prolate shapes in the negative-parity bands. [S0556-2813(99)04602-6]. (Less)
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Physical Review C (Nuclear Physics)
volume
59
issue
2
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655 - 664
publisher
American Physical Society
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  • scopus:0033248714
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0556-2813
DOI
10.1103/PhysRevC.59.655
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English
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cfc54b13-bd3d-43f2-ab96-899b8bc27803 (old id 3964653)
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2013-08-13 18:48:48
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@article{cfc54b13-bd3d-43f2-ab96-899b8bc27803,
  abstract     = {High-spin states in Kr-78 were studied using the Ni-58(Na-23,3p) reaction at 70 MeV and the Ni-58(Si-23,alpha 4p) reaction at 130 MeV. Prompt gamma-gamma coincidences were measured using the Pitt-FSU detector array and the GAMMASPHERE-MICROBALL array. Results from these experiments have led to 26 new excitation levels, some of which have been grouped into 3 new bands. Spins were assigned based on directional correlations of oriented nuclei. Two of the new negative-parity bands appear to form a signature-partner pair based on a two-quasineutron structure, in contrast to the previously known two-quasiproton negative-parity bands. A forking has been observed at the 24(+) state in the yrast band, which calculations suggest may result from an unpaired crossing. The available evidence suggests oblate shapes in the yrast band coexist with prolate shapes in the negative-parity bands. [S0556-2813(99)04602-6].},
  author       = {Sun, H. and Doring, J. and Johns, G. D. and Kaye, R. A. and Solomon, G. Z. and Tabor, S. L. and Devlin, M. and LaFosse, D. R. and Lerma, F. and Sarantites, D. G. and Baktash, C. and Rudolph, Dirk and Yu, C. H. and Lee, I. Y. and Macchiavelli, A. O. and Birriel, I. and Saladin, J. X. and Winchell, D. F. and Wood, V. Q. and Ragnarsson, I.},
  issn         = {0556-2813},
  language     = {eng},
  number       = {2},
  pages        = {655--664},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {New Band Structures and an Unpaired Crossing in 78Kr},
  url          = {http://dx.doi.org/10.1103/PhysRevC.59.655},
  volume       = {59},
  year         = {1999},
}