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Exploring the I = 50-60(Latin small letter h with stroke) domain : Collective and terminating structures in 156Dy, 159Er and 160Er

Kondev, F. G. ; Riley, M. A. ; Simpson, J. ; Janssens, R. V.F. ; Afanasjev, A. V. ; Ragnarsson, I. LU ; Brown, T. B. ; Hartley, D. J. ; Carpenter, M. P. and Fallon, P. , et al. (1999) In Journal of Physics G: Nuclear and Particle Physics 25(4). p.897-899
Abstract

Very high spin (50-60(Latin small letter h with stroke)) states in transitional 156Dy, 159Er and 160Er nuclei have been studied using the GAMMASPHERE and EUROGAM γ-ray spectrometers. The lowest energy positive-parity bands in 156Dy are found to evolve smoothly towards an oblate shape in contrast to the sudden change observed in the neighbouring 158Er nucleus. In 159Er, the decay path of the positive-parity yrast band splits above Iπ = 85/2+ and favoured multi-particle-hole states are identified in the irregular pattern at 89/2+ and 101/2+. The yrast structure of 160Er is found to remain collective up to and beyond 50(Latin small... (More)

Very high spin (50-60(Latin small letter h with stroke)) states in transitional 156Dy, 159Er and 160Er nuclei have been studied using the GAMMASPHERE and EUROGAM γ-ray spectrometers. The lowest energy positive-parity bands in 156Dy are found to evolve smoothly towards an oblate shape in contrast to the sudden change observed in the neighbouring 158Er nucleus. In 159Er, the decay path of the positive-parity yrast band splits above Iπ = 85/2+ and favoured multi-particle-hole states are identified in the irregular pattern at 89/2+ and 101/2+. The yrast structure of 160Er is found to remain collective up to and beyond 50(Latin small letter h with stroke) with no sign of an apparent termination.

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type
Contribution to journal
publication status
published
subject
in
Journal of Physics G: Nuclear and Particle Physics
volume
25
issue
4
pages
3 pages
publisher
IOP Publishing
external identifiers
  • scopus:0039628175
ISSN
0954-3899
DOI
10.1088/0954-3899/25/4/064
language
English
LU publication?
yes
id
70cc1230-9e09-4c55-a1ed-9699af99f045
date added to LUP
2026-01-15 10:16:14
date last changed
2026-02-06 15:10:16
@article{70cc1230-9e09-4c55-a1ed-9699af99f045,
  abstract     = {{<p>Very high spin (50-60(Latin small letter h with stroke)) states in transitional <sup>156</sup>Dy, <sup>159</sup>Er and <sup>160</sup>Er nuclei have been studied using the GAMMASPHERE and EUROGAM γ-ray spectrometers. The lowest energy positive-parity bands in <sup>156</sup>Dy are found to evolve smoothly towards an oblate shape in contrast to the sudden change observed in the neighbouring <sup>158</sup>Er nucleus. In <sup>159</sup>Er, the decay path of the positive-parity yrast band splits above Iπ = 85/2<sup>+</sup> and favoured multi-particle-hole states are identified in the irregular pattern at 89/2<sup>+</sup> and 101/2<sup>+</sup>. The yrast structure of <sup>160</sup>Er is found to remain collective up to and beyond 50(Latin small letter h with stroke) with no sign of an apparent termination.</p>}},
  author       = {{Kondev, F. G. and Riley, M. A. and Simpson, J. and Janssens, R. V.F. and Afanasjev, A. V. and Ragnarsson, I. and Brown, T. B. and Hartley, D. J. and Carpenter, M. P. and Fallon, P. and Fischer, S. M. and Khoo, T. L. and Lauritsen, T. and Ma, W. C. and Sharpey-Schafer, J. F. and Lisle, J. C. and Kalfas, C. A.}},
  issn         = {{0954-3899}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{897--899}},
  publisher    = {{IOP Publishing}},
  series       = {{Journal of Physics G: Nuclear and Particle Physics}},
  title        = {{Exploring the I = 50-60(Latin small letter h with stroke) domain : Collective and terminating structures in <sup>156</sup>Dy, <sup>159</sup>Er and <sup>160</sup>Er}},
  url          = {{http://dx.doi.org/10.1088/0954-3899/25/4/064}},
  doi          = {{10.1088/0954-3899/25/4/064}},
  volume       = {{25}},
  year         = {{1999}},
}