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Deformations and Shape Changes in 81Y

Johnson, T. D.; Raguse, A.; Gross, C. J.; Kabadiyski, M. K.; Lieb, K. P.; Rudolph, Dirk LU ; Weiszflog, M.; Burkardt, T.; Eberth, J. and Skoda, S. (1994) In Zeitschrift für Physik A Hadrons and Nuclei 350(3). p.189-197
Abstract
High spin states in Y-81 UP to the probable 33/2(+) and 29/2(-) yrast states have been measured via the reaction Ni-58(Si-28, alpha p), using the Cologne tandem accelerator. Directional correlations of oriented nuclei were determined and the level scheme was extended with lifetimes measured by means of DSA and recoil distance techniques. Reduced transition strengths inferred from lifetimes were consistent with the results of Hartree-Fock-Bogolyubov calculations, which predict a nearly axially symmetric deformation of beta(2) approximate to 0.37 for the pi = + band. Predictions reveal an alignment driving the system to a smaller and triaxial deformation with beta(2) = 0.23 and gamma = -30 degrees, although the data show this crossing to be... (More)
High spin states in Y-81 UP to the probable 33/2(+) and 29/2(-) yrast states have been measured via the reaction Ni-58(Si-28, alpha p), using the Cologne tandem accelerator. Directional correlations of oriented nuclei were determined and the level scheme was extended with lifetimes measured by means of DSA and recoil distance techniques. Reduced transition strengths inferred from lifetimes were consistent with the results of Hartree-Fock-Bogolyubov calculations, which predict a nearly axially symmetric deformation of beta(2) approximate to 0.37 for the pi = + band. Predictions reveal an alignment driving the system to a smaller and triaxial deformation with beta(2) = 0.23 and gamma = -30 degrees, although the data show this crossing to be somewhat delayed. Particle-rotor calculations for the one-quasiparticle bands corroborate the predictions of deformation parameters based on the cranking model. (Less)
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type
Contribution to journal
publication status
published
subject
in
Zeitschrift für Physik A Hadrons and Nuclei
volume
350
issue
3
pages
189 - 197
publisher
Springer
external identifiers
  • scopus:0002922232
ISSN
0939-7922
DOI
10.1007/BF01289582
language
English
LU publication?
no
id
90e74073-08f9-4600-aae6-12f62315e858 (old id 3963937)
alternative location
http://link.springer.com/article/10.1007/BF01289582
date added to LUP
2013-08-13 18:52:43
date last changed
2017-01-01 07:16:48
@article{90e74073-08f9-4600-aae6-12f62315e858,
  abstract     = {High spin states in Y-81 UP to the probable 33/2(+) and 29/2(-) yrast states have been measured via the reaction Ni-58(Si-28, alpha p), using the Cologne tandem accelerator. Directional correlations of oriented nuclei were determined and the level scheme was extended with lifetimes measured by means of DSA and recoil distance techniques. Reduced transition strengths inferred from lifetimes were consistent with the results of Hartree-Fock-Bogolyubov calculations, which predict a nearly axially symmetric deformation of beta(2) approximate to 0.37 for the pi = + band. Predictions reveal an alignment driving the system to a smaller and triaxial deformation with beta(2) = 0.23 and gamma = -30 degrees, although the data show this crossing to be somewhat delayed. Particle-rotor calculations for the one-quasiparticle bands corroborate the predictions of deformation parameters based on the cranking model.},
  author       = {Johnson, T. D. and Raguse, A. and Gross, C. J. and Kabadiyski, M. K. and Lieb, K. P. and Rudolph, Dirk and Weiszflog, M. and Burkardt, T. and Eberth, J. and Skoda, S.},
  issn         = {0939-7922},
  language     = {eng},
  number       = {3},
  pages        = {189--197},
  publisher    = {Springer},
  series       = {Zeitschrift für Physik A Hadrons and Nuclei},
  title        = {Deformations and Shape Changes in 81Y},
  url          = {http://dx.doi.org/10.1007/BF01289582},
  volume       = {350},
  year         = {1994},
}