| Autor: |
Kelsall, N. S., Svensson, C. E., Fischer, S., Appelbe, D. E., Austin, R. A. E., Balamuth, D. P., Ball, G. C., Cameron, J. A., Carpenter, M. P., Clark, R. M., Cromaz, M., Deleplanque, M. A., Diamond, R. M., Durell, J. L., Fallon, P., Freeman, S. J., Hausladen, P. A., Hodgson, D. F., Janssens, R. V. F. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2003, Vol. 656 Issue 1, p261, 8p |
| Abstrakt: |
High-spin states have been studied in [sup 72,73]Kr using [sup 40]Ca+[sup 40]Ca and [sup 36]Ar+[sup 40]Ca reactions at 160, 164 and 145 MeV respectively. The properties and configurations of the bands observed are interpreted with the aid of unpaired cranked Nilsson-Strutinsky/cranked relativistic mean-field calculations and paired total routhian surface and cranked relativistic Hartree-Bogoliubov calculations. In [sup 73]Kr the three previously known structures have been extended to a spin of ∼30h and a fourth structure, which is believed to be the signature partner to the g[sub 9/2] band, has been identified. The negative parity bands show evidence for an unusual type of band crossing. It is currently unclear whether this is a consequence of T=0 n-p pairing. At the highest spins the unpaired calculations can reproduce the observed data, suggesting that there is little evidence for pairing correlations in this spin regime. In [sup 72]Kr a new band has been identified that has the properties expected from the missing doubly aligned S-band configuration. The properties of this band can be reproduced by the unpaired CNS/CRMF calculations, again suggesting that the structure has little pairing. However, paired calculations appear to be necessary to reproduce the properties of the previously known structure in this nucleus. The [sup 72]Kr results are also compared with projected shell model calculations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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