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Strongly Deformed Nuclear Shapes at Ultra-High Spin and Shape Coexistence in N\sim 90 Nuclei

Riley, M. A.; Aguilar, A.; Evans, A. O.; Hartley, D. J.; Lagergren, K.; Ollier, J.; Paul, E. S.; Pipidis, A.; Simpson, J. and Teal, C., et al. (2009) 43rd Zakopane Conference on Nuclear Physics In Acta Physica Polonica B 40(3). p.513-522
Abstract
The N similar to 90 region of the nuclear chart has featured prominently as the spectroscopy of nuclei at extreme spin has progressed. This talk will present recent discoveries from investigations of high spin behavior in the N similar to 90 Er, Tm and Yb nuclei utilizing the Gammasphere gamma-ray spectrometer. In particular it will include discussion of the beautiful shape evolution and coexistence observed in these nuclei along with the identification of a remarkable new family of band structures. The latter are very weakly populated rotational sequences with high moment of inertia that bypass the classic terminating configurations near spin 40-50 (h) over bar, marking a return to collectivity that extends discrete gamma-ray spectroscopy... (More)
The N similar to 90 region of the nuclear chart has featured prominently as the spectroscopy of nuclei at extreme spin has progressed. This talk will present recent discoveries from investigations of high spin behavior in the N similar to 90 Er, Tm and Yb nuclei utilizing the Gammasphere gamma-ray spectrometer. In particular it will include discussion of the beautiful shape evolution and coexistence observed in these nuclei along with the identification of a remarkable new family of band structures. The latter are very weakly populated rotational sequences with high moment of inertia that bypass the classic terminating configurations near spin 40-50 (h) over bar, marking a return to collectivity that extends discrete gamma-ray spectroscopy to well over 60 (h) over bar. Establishing the nature of the yrast states in these nuclei beyond the oblate band-termination states has been a major goal for the past two decades. Cranking calculations suggest that these new structures most likely represent stable triaxial strongly deformed bands that lie in a valley of favored shell energy in deformation and particle-number space. (Less)
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Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Acta Physica Polonica B
volume
40
issue
3
pages
513 - 522
publisher
Jagellonian University, Cracow, Poland
conference name
43rd Zakopane Conference on Nuclear Physics
external identifiers
  • wos:000264436200017
  • scopus:62549129813
ISSN
0587-4254
language
English
LU publication?
yes
id
3c6c0ac2-1361-4d45-a88d-392f0fe00971 (old id 1402006)
alternative location
http://th-www.if.uj.edu.pl/acta/vol40/abs/v40p0513.htm
date added to LUP
2009-05-28 14:11:11
date last changed
2017-01-01 06:29:26
@inproceedings{3c6c0ac2-1361-4d45-a88d-392f0fe00971,
  abstract     = {The N similar to 90 region of the nuclear chart has featured prominently as the spectroscopy of nuclei at extreme spin has progressed. This talk will present recent discoveries from investigations of high spin behavior in the N similar to 90 Er, Tm and Yb nuclei utilizing the Gammasphere gamma-ray spectrometer. In particular it will include discussion of the beautiful shape evolution and coexistence observed in these nuclei along with the identification of a remarkable new family of band structures. The latter are very weakly populated rotational sequences with high moment of inertia that bypass the classic terminating configurations near spin 40-50 (h) over bar, marking a return to collectivity that extends discrete gamma-ray spectroscopy to well over 60 (h) over bar. Establishing the nature of the yrast states in these nuclei beyond the oblate band-termination states has been a major goal for the past two decades. Cranking calculations suggest that these new structures most likely represent stable triaxial strongly deformed bands that lie in a valley of favored shell energy in deformation and particle-number space.},
  author       = {Riley, M. A. and Aguilar, A. and Evans, A. O. and Hartley, D. J. and Lagergren, K. and Ollier, J. and Paul, E. S. and Pipidis, A. and Simpson, J. and Teal, C. and Twin, P. J. and Wang, X. and Appelbe, D. E. and Campbell, D. B. and Carpenter, M. P. and Clark, R. M. and Cromaz, M. and Darby, I. G. and Fallon, P. and Garg, U. and Janssens, R. V. F. and Joss, D. T. and Kondev, F. G. and Lauritsen, T. and Lee, I. Y. and Lister, C. J. and Macchiavelli, A. O. and Nolan, P. J. and Petri, M. and Rigby, S. V. and Thompson, J. and Unsworth, C. and Ward, D. and Zhu, S. and Ragnarsson, Ingemar},
  booktitle    = {Acta Physica Polonica B},
  issn         = {0587-4254},
  language     = {eng},
  number       = {3},
  pages        = {513--522},
  publisher    = {Jagellonian University, Cracow, Poland},
  title        = {Strongly Deformed Nuclear Shapes at Ultra-High Spin and Shape Coexistence in N\sim 90 Nuclei},
  volume       = {40},
  year         = {2009},
}