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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. (author)
Butler, P. A. (author)
Jenkins, D. G. (author)
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Delahaye, P. (author)
Wenander, F. (author)
Ames, F. (author)
Barton, C. J. (author)
Behrens, T. (author)
Burger, A. (author)
Cederkäll, Joakim (author)
Lund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Clement, E. (author)
Czosnyka, T. (author)
Davinson, T. (author)
de Angelis, G. (author)
Eberth, J. (author)
Ekström, Andreas (author)
Lund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Franchoo, S. (author)
Georgiev, G. (author)
Gorgen, A. (author)
Herzberg, R. -D. (author)
Huyse, M. (author)
Ivanov, O. (author)
Iwanicki, J. (author)
Jones, G. D. (author)
Kent, P. (author)
Koester, U. (author)
Kroell, T. (author)
Kruecken, R. (author)
Larsen, A. C. (author)
Nespolo, M. (author)
Pantea, M. (author)
Paul, E. S. (author)
Petri, M. (author)
Scheit, H. (author)
Sieber, T. (author)
Siem, S. (author)
Smith, J. F. (author)
Steer, A. (author)
Stefanescu, I. (author)
Syed, N. U. H. (author)
de Walle, J. Van (author)
Van Duppen, P. (author)
Wadsworth, R. (author)
Warr, N. (author)
Weisshaar, D. (author)
Zielinska, M. (author)
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 (creator_code:org_t)
2007
2007
English.
In: Physical Review Letters. - 1079-7114. ; 98:7
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)

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art (subject category)
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