Abstract
The mean lifetimes of the lower spin states of the superdeformed band in133Nd have been measured with the coincidence recoil distance method. The reaction used to populate the band was105Pd (32S, 2p2n)133Nd at a beam energy of 152 MeV, and the gamma-rays were detected with the POLYTESSA array. The differential decay curve method was used to analyse the data and transition quadrupole moments,Q 0, were extracted from the measured lifetimes. The results obtained from the three lowest transitions in the superdeformed band are:Q 0=6.3±0.9 eb (21+/2→17+/2),Q 0=6.7±1.1 eb (25+/2→21+/2) andQ 0>5.0 eb (29+/2→25+/2). These results are consistent with previous results for the high spin members of the band, and are compared to theoretical calculations of total routhian surfaces. The calculation of reduced transition probabilities for the transitions that feed out of the band, allows the effect of hindrance due to K-forbiddenness to be investigated.
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This work was supported by the UK Science and Engineering Research Council and the German Federal Minister for Research and Technology (BMFT). Three of us (SAF, RMC and PHR) acknowledge the receipt of SERC studentships during the course of this work. We also thank the staff and crew at the Nuclear Structure Facility, Daresbury Laboratory, for providing the beam and experimental support.
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Forbes, S.A., Böhm, G., Clark, R.M. et al. Measurement of the mean lifetimes of low spin states in the superdeformed band in133Nd. Z. Physik A - Hadrons and Nuclei 352, 15–23 (1995). https://doi.org/10.1007/BF01292757
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DOI: https://doi.org/10.1007/BF01292757