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Beyond band termination in Er-157 and the search for wobbling excitations in strongly deformed Hf-174

Riley, M A; Djongolov, M K; Evans, A O; Hartley, D J; Janssens, R V F; Paul, E S; Simpson, J; Aguilar, A A; Appelbe, D E and Bingham, C R, et al. (2005) In Journal of Physics G: Nuclear and Particle Physics 31(10). p.1735-1740
Abstract
High-spin terminating bands in heavy nuclei were first identified in nuclei around Er-158(90). While examples of special terminating states have been identified in a number of erbium isotopes, almost nothing is known about the states lying beyond band termination. In the present work the high-spin structure of Er-157 has been studied using the Gammasphere spectrometer. The subject of triaxial superdeformation and 'wobbling' modes in Lu nuclei has rightly attracted a great deal of attention. Very recently, four strongly or superdeformed (SD) sequences have been observed in Hf-174 and ultimate cranker calculations predict, such structures may have significant triaxial deformation. We have performed two experiments in an attempt to verify the... (More)
High-spin terminating bands in heavy nuclei were first identified in nuclei around Er-158(90). While examples of special terminating states have been identified in a number of erbium isotopes, almost nothing is known about the states lying beyond band termination. In the present work the high-spin structure of Er-157 has been studied using the Gammasphere spectrometer. The subject of triaxial superdeformation and 'wobbling' modes in Lu nuclei has rightly attracted a great deal of attention. Very recently, four strongly or superdeformed (SD) sequences have been observed in Hf-174 and ultimate cranker calculations predict, such structures may have significant triaxial deformation. We have performed two experiments in an attempt to verify the possible triaxial nature of these bands. A lifetime measurement was performed to confirm the large (and similar) deformation of the bands. In addition, a high-statistics, thin-target experiment was run to search for linking transitions between the SD bands and possible wobbling modes. (Less)
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Journal of Physics G: Nuclear and Particle Physics
volume
31
issue
10
pages
1735 - 1740
publisher
IOP Publishing
external identifiers
  • wos:000232575600066
  • scopus:25444447399
ISSN
0954-3899
DOI
10.1088/0954-3899/31/10/064
language
English
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yes
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aee3c792-bc22-4622-af7e-8964ae784b47 (old id 218694)
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2007-08-07 08:45:56
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2017-01-01 07:19:29
@article{aee3c792-bc22-4622-af7e-8964ae784b47,
  abstract     = {High-spin terminating bands in heavy nuclei were first identified in nuclei around Er-158(90). While examples of special terminating states have been identified in a number of erbium isotopes, almost nothing is known about the states lying beyond band termination. In the present work the high-spin structure of Er-157 has been studied using the Gammasphere spectrometer. The subject of triaxial superdeformation and 'wobbling' modes in Lu nuclei has rightly attracted a great deal of attention. Very recently, four strongly or superdeformed (SD) sequences have been observed in Hf-174 and ultimate cranker calculations predict, such structures may have significant triaxial deformation. We have performed two experiments in an attempt to verify the possible triaxial nature of these bands. A lifetime measurement was performed to confirm the large (and similar) deformation of the bands. In addition, a high-statistics, thin-target experiment was run to search for linking transitions between the SD bands and possible wobbling modes.},
  author       = {Riley, M A and Djongolov, M K and Evans, A O and Hartley, D J and Janssens, R V F and Paul, E S and Simpson, J and Aguilar, A A and Appelbe, D E and Bingham, C R and Campbell, D B and Carpenter, M P and Chowdhury, P and Choy, P T W and Clark, R M and Cromaz, M and Cullen, D M and Danchev, M and Dracoulis, G D and Fallon, P and Gorgen, A and Hagemann, G B and Joss, D T and Goon, J and Kaye, R A and Khoo, TL and Kondev, F G and Laird, R W and Lagergren, K and Lauritsen, T and Macchiavelli, A O and McClain, B and Moore, EF and Mukherjee, G and Ngijoi-Yogo, E and Nolan, P J and Park, H I and Pipidis, A and Riedinger, L L and Sletten, G and Tandel, S K and Walker, P M and Ward, D and Ragnarsson, Ingemar and Saric, Fikret and Zhang, J Y},
  issn         = {0954-3899},
  language     = {eng},
  number       = {10},
  pages        = {1735--1740},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics G: Nuclear and Particle Physics},
  title        = {Beyond band termination in Er-157 and the search for wobbling excitations in strongly deformed Hf-174},
  url          = {http://dx.doi.org/10.1088/0954-3899/31/10/064},
  volume       = {31},
  year         = {2005},
}