Single particle excitations and properties of multiple band terminations near spin 50h{stroke} in 158Er

Simpson, J. and Riley, M.A. and Gale, S.J. and Sharpey-Schafer, J.F. and Bentley, M.A. and Bruce, A.M. and Chapman, R. and Clark, R.M. and Clarke, S. and Copnell, J. and Cullen, D.M. and Fallon, P. and Fitzpatrick, A. and Forsyth, P.D. and Freeman, S.J. and Jones, P.M. and Joyce, M.J. and Liden, F. and Lisle, J.C. and Macchiavelli, A.O. and Smith, A.G. and Smith, J.F. and Sweeney, J. and Thompson, D.M. and Warburton, S. and Wilson, J.N. and Bengtsson, T. and Ragnarsson, I. (1994) Single particle excitations and properties of multiple band terminations near spin 50h{stroke} in 158Er. Physics Letters B, 327 (3-4). pp. 187-194. ISSN 0370-2693

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Abstract

The competition between collective rotation and single-particle behaviour at high spin in 158Er has been investigated with the Eurogam spectrometer. Band terminating states have been observed in three structures at Iπ = 46+, 48− and 49− and specific single-particle configurations are assigned by comparison with cranked Nilsson-Strutinsky calculations. These special states are found to be related by very simple single particle excitations. These data indicate that an oblate mean field (ϵ ∼ −0.14) is established for a nuclear core plus 12 aligned valence nucleons which is stable against single-particle rearrangements. In the (π, α) = (+, 0) states the collective and weakly collective terminating structures are observed to coexist between 30+ and 46+.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
132377
Deposited By:
Deposited On:
01 Apr 2019 12:30
Refereed?:
Yes
Published?:
Published
Last Modified:
09 Feb 2020 04:35