Deformation of rotational structures in 73Kr and 74Rb: Probing the additivity principle at triaxial shapes

F. Johnston-Theasby, A. V. Afanasjev, C. Andreoiu, R. A. E. Austin, M. P. Carpenter, D. Dashdorj, S. J. Freeman, P. E. Garrett, J. Greene, A. Gorgen, D. G. Jenkins, P. Joshi, A. O. Macchiavelli, F. Moore, G. Mukherjee, W. Reviol, D. Sarantites, D. Seweryniak, M. B. Smith, C. E. SvenssonJ. J. Valiente-Dobon, R Wadsworth, D. Ward

Research output: Contribution to journalArticlepeer-review

Abstract

Lifetimes have been deduced in the intermediate/high-spin range for the three known rotational bands in Kr-73 and the T = 0 band in Rb-74 using the residual Doppler shift method. This has enabled relative transition quadrupole moments to be studied for the first time in triaxial nuclei as a function of spin. The data suggest that the additivity principle for transition quadrupole moments is violated, a result that is in disagreement with predictions from cranked Nilsson-Strutinsky and cranked relativistic mean-field theory calculations. The reasons for the discrepancy are not understood but may indicate that important correlations are missing from the models.

Original languageEnglish
Article number034312
Number of pages8
JournalPhysical Review C
Volume78
Issue number3
DOIs
Publication statusPublished - 18 Sept 2008

Keywords

  • SINGLE-PARTICLE MOTION
  • SUPERDEFORMED BANDS
  • LIFETIME MEASUREMENTS
  • QUADRUPOLE-MOMENTS
  • HIGH-SPIN
  • TERMINATING BANDS
  • MASS REGION
  • NUCLEI
  • COLLECTIVITY
  • GAMMASPHERE

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