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High-spin studies of N ~ Z nuclei in the mass 70 region

Kelsall, N.S.; Svensson, C.E.; Afanasjev, A.V.; Frauendorf, S.; Ragnarsson, Ingemar LU ; Wyss, R. and al., et (2003) Conference on Frontiers of Nuclear Structure In AIP Conference Proceedings p.261-268
Abstract
High-spin states have been studied in 72,73Kr using 40Ca+40Ca and 36Ar+40Ca 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 73Kr the three previously known structures have been extended to a spin of ~30[h-bar] and a fourth structure, which is believed to be the signature partner to the g9/2 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... (More)
High-spin states have been studied in 72,73Kr using 40Ca+40Ca and 36Ar+40Ca 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 73Kr the three previously known structures have been extended to a spin of ~30[h-bar] and a fourth structure, which is believed to be the signature partner to the g9/2 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 72Kr 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 72Kr results are also compared with projected shell model calculations. ©2003 American Institute of Physics (Less)
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type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
AIP Conference Proceedings
editor
Fallon, P.; Clark, R.; and
issue
656
pages
8 pages
publisher
American Institute of Physics
conference name
Conference on Frontiers of Nuclear Structure
external identifiers
  • other:CODEN: APCPCS
ISSN
1551-7616
0094-243X
language
English
LU publication?
yes
id
4e328f35-edc4-4e47-89b0-a5cf00c6fcbf (old id 713889)
date added to LUP
2007-12-11 12:25:49
date last changed
2016-04-15 20:16:40
@inproceedings{4e328f35-edc4-4e47-89b0-a5cf00c6fcbf,
  abstract     = {High-spin states have been studied in 72,73Kr using 40Ca+40Ca and 36Ar+40Ca 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 73Kr the three previously known structures have been extended to a spin of ~30[h-bar] and a fourth structure, which is believed to be the signature partner to the g9/2 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 72Kr 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 72Kr results are also compared with projected shell model calculations. ©2003 American Institute of Physics},
  author       = {Kelsall, N.S. and Svensson, C.E. and Afanasjev, A.V. and Frauendorf, S. and Ragnarsson, Ingemar and Wyss, R. and al., et},
  booktitle    = {AIP Conference Proceedings},
  editor       = {Fallon, P. and Clark, R.},
  issn         = {1551-7616},
  language     = {eng},
  number       = {656},
  pages        = {261--268},
  publisher    = {American Institute of Physics},
  title        = {High-spin studies of N ~ Z nuclei in the mass 70 region},
  year         = {2003},
}