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Measurement of the sign of the spectroscopic quadrupole moment for the 2(1)(+) state in Se-70: No evidence for oblate shape

Hurst, A. M.; Butler, P. A.; Jenkins, D. G.; Delahaye, P.; Wenander, F.; Ames, F.; Barton, C. J.; Behrens, T.; Burger, A. and Cederkäll, Joakim LU , et al. (2007) In Physical Review Letters 98(7).
Abstract
Using a method whereby molecular and atomic ions are independently selected, an isobarically pure beam of Se-70 ions was postaccelerated to an energy of 206 MeV using REX-ISOLDE. Coulomb-excitation yields for states in the beam and target nuclei were deduced by recording deexcitation gamma rays in the highly segmented MINIBALL gamma-ray spectrometer in coincidence with scattered particles in a silicon detector. At these energies, the Coulomb-excitation yield for the first 2(+) state is expected to be strongly sensitive to the sign of the spectroscopic quadrupole moment through the nuclear reorientation effect. Experimental evidence is presented here for a prolate shape for the first 2(+) state in Se-70, reopening the question over whether... (More)
Using a method whereby molecular and atomic ions are independently selected, an isobarically pure beam of Se-70 ions was postaccelerated to an energy of 206 MeV using REX-ISOLDE. Coulomb-excitation yields for states in the beam and target nuclei were deduced by recording deexcitation gamma rays in the highly segmented MINIBALL gamma-ray spectrometer in coincidence with scattered particles in a silicon detector. At these energies, the Coulomb-excitation yield for the first 2(+) state is expected to be strongly sensitive to the sign of the spectroscopic quadrupole moment through the nuclear reorientation effect. Experimental evidence is presented here for a prolate shape for the first 2(+) state in Se-70, reopening the question over whether there are, as reported earlier, deformed oblate shapes near to the ground state in the light selenium isotopes. (Less)
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Physical Review Letters
volume
98
issue
7
publisher
American Physical Society
external identifiers
  • wos:000244250300022
  • scopus:33847042363
ISSN
1079-7114
DOI
10.1103/PhysRevLett.98.072501
language
English
LU publication?
yes
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d2cacd51-7273-478f-b41c-82ca20d952a2 (old id 674039)
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2007-12-12 09:32:50
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2017-07-23 03:49:08
@article{d2cacd51-7273-478f-b41c-82ca20d952a2,
  abstract     = {Using a method whereby molecular and atomic ions are independently selected, an isobarically pure beam of Se-70 ions was postaccelerated to an energy of 206 MeV using REX-ISOLDE. Coulomb-excitation yields for states in the beam and target nuclei were deduced by recording deexcitation gamma rays in the highly segmented MINIBALL gamma-ray spectrometer in coincidence with scattered particles in a silicon detector. At these energies, the Coulomb-excitation yield for the first 2(+) state is expected to be strongly sensitive to the sign of the spectroscopic quadrupole moment through the nuclear reorientation effect. Experimental evidence is presented here for a prolate shape for the first 2(+) state in Se-70, reopening the question over whether there are, as reported earlier, deformed oblate shapes near to the ground state in the light selenium isotopes.},
  author       = {Hurst, A. M. and Butler, P. A. and Jenkins, D. G. and Delahaye, P. and Wenander, F. and Ames, F. and Barton, C. J. and Behrens, T. and Burger, A. and Cederkäll, Joakim and Clement, E. and Czosnyka, T. and Davinson, T. and de Angelis, G. and Eberth, J. and Ekström, Andreas and Franchoo, S. and Georgiev, G. and Gorgen, A. and Herzberg, R. -D. and Huyse, M. and Ivanov, O. and Iwanicki, J. and Jones, G. D. and Kent, P. and Koester, U. and Kroell, T. and Kruecken, R. and Larsen, A. C. and Nespolo, M. and Pantea, M. and Paul, E. S. and Petri, M. and Scheit, H. and Sieber, T. and Siem, S. and Smith, J. F. and Steer, A. and Stefanescu, I. and Syed, N. U. H. and de Walle, J. Van and Van Duppen, P. and Wadsworth, R. and Warr, N. and Weisshaar, D. and Zielinska, M.},
  issn         = {1079-7114},
  language     = {eng},
  number       = {7},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Measurement of the sign of the spectroscopic quadrupole moment for the 2(1)(+) state in Se-70: No evidence for oblate shape},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.98.072501},
  volume       = {98},
  year         = {2007},
}