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Structural behavior of Dy-157,Dy-158,Dy-159 in the I=30-50h spin regime

Pipidis, A.; Riley, M.A.; Simpson, J.; Ragnarsson, Ingemar LU and al, et (2005) In Physical Review C: covering nuclear physics 72. p.1-064307
Abstract
Significant extensions to the high-spin excitation spectrum of the N = 91, 92, 93 isotopes Dy-157,Dy-158,Dy-159 have been achieved using the high-efficiency gamma-ray spectrometers Euroball and Gammasphere. These nuclei were populated via weak 3n or alpha xn exit channels in fusion evaporation reactions. In Dy-157, the yrast band has been extended to I-pi = (2)/(101+) (tentatively to (2)/(105+)) with four sideband structures (two of which are new) observed in the 35-50h spin range. In Dy-158, three bands have been extended to 42(+)(44(+)),40(-), and 41(-)(43(-)), whereas in Dy-159 the yrast band is observed to (2)/(81+) ((2)/(85+)). The high-spin behavior and band crossing systematics of the Dy isotopes and of the neighboring N = 91, 92,... (More)
Significant extensions to the high-spin excitation spectrum of the N = 91, 92, 93 isotopes Dy-157,Dy-158,Dy-159 have been achieved using the high-efficiency gamma-ray spectrometers Euroball and Gammasphere. These nuclei were populated via weak 3n or alpha xn exit channels in fusion evaporation reactions. In Dy-157, the yrast band has been extended to I-pi = (2)/(101+) (tentatively to (2)/(105+)) with four sideband structures (two of which are new) observed in the 35-50h spin range. In Dy-158, three bands have been extended to 42(+)(44(+)),40(-), and 41(-)(43(-)), whereas in Dy-159 the yrast band is observed to (2)/(81+) ((2)/(85+)). The high-spin behavior and band crossing systematics of the Dy isotopes and of the neighboring N = 91, 92, and 93 isotones are discussed in terms of rotational alignments and shape transitions. Cranked Nilsson-Strutinsky calculations without pairing have been performed for detailed comparisons with the very high-spin states observed in Dy-157. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C: covering nuclear physics
volume
72
pages
1 - 064307
publisher
American Physical Society
external identifiers
  • WOS:000234337400021
  • Scopus:33244479382
DOI
10.1103/PhysRevC.72.064307
language
English
LU publication?
yes
id
8e077967-f517-4364-b0e5-9f5e34db40d5 (old id 713194)
date added to LUP
2007-12-11 14:03:34
date last changed
2016-10-13 04:42:39
@misc{8e077967-f517-4364-b0e5-9f5e34db40d5,
  abstract     = {Significant extensions to the high-spin excitation spectrum of the N = 91, 92, 93 isotopes Dy-157,Dy-158,Dy-159 have been achieved using the high-efficiency gamma-ray spectrometers Euroball and Gammasphere. These nuclei were populated via weak 3n or alpha xn exit channels in fusion evaporation reactions. In Dy-157, the yrast band has been extended to I-pi = (2)/(101+) (tentatively to (2)/(105+)) with four sideband structures (two of which are new) observed in the 35-50h spin range. In Dy-158, three bands have been extended to 42(+)(44(+)),40(-), and 41(-)(43(-)), whereas in Dy-159 the yrast band is observed to (2)/(81+) ((2)/(85+)). The high-spin behavior and band crossing systematics of the Dy isotopes and of the neighboring N = 91, 92, and 93 isotones are discussed in terms of rotational alignments and shape transitions. Cranked Nilsson-Strutinsky calculations without pairing have been performed for detailed comparisons with the very high-spin states observed in Dy-157.},
  author       = {Pipidis, A. and Riley, M.A. and Simpson, J. and Ragnarsson, Ingemar and al, et},
  language     = {eng},
  pages        = {1--064307},
  publisher    = {ARRAY(0x7524738)},
  series       = {	Physical Review C: covering nuclear physics},
  title        = {Structural behavior of Dy-157,Dy-158,Dy-159 in the I=30-50h spin regime},
  url          = {http://dx.doi.org/10.1103/PhysRevC.72.064307},
  volume       = {72},
  year         = {2005},
}