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Relative quadrupole moments of exotic shapes at ultrahigh spin in 154Er : Calibrating the TSD/SD puzzle

Revill, J. P. (author)
University of Liverpool
Paul, E. S. (author)
University of Liverpool
Wang, X. (author)
Florida State University
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Riley, M. A. (author)
Florida State University
Simpson, J. (author)
Daresbury Laboratory
Ollier, J. (author)
Daresbury Laboratory
Boston, A. J. (author)
University of Liverpool
Carpenter, M. P. (author)
Argonne National Laboratory
Chiara, C. J. (author)
University of Maryland,Argonne National Laboratory
Hoffman, C. (author)
Argonne National Laboratory
Janssens, R. V.F. (author)
Argonne National Laboratory
Kondev, F. G. (author)
Argonne National Laboratory
Lauritsen, T. (author)
Argonne National Laboratory
Nolan, P. J. (author)
University of Liverpool
Rees, J. M. (author)
Lund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,University of Liverpool
Rigby, S. V. (author)
University of Liverpool
Unsworth, C. (author)
University of Liverpool
Zhu, S. (author)
Argonne National Laboratory
Ragnarsson, I. (author)
Lund University,Lunds universitet,Matematisk fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Mathematical Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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 (creator_code:org_t)
2012-09-18
2012
English.
In: Journal of Physics: Conference Series. - : IOP Publishing. - 1742-6588 .- 1742-6596.
Related links:
http://dx.doi.org/10... (free)
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https://doi.org/10.1...
https://lup.lub.lu.s...
https://doi.org/10.1...
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  • Conference paper (peer-reviewed)
Abstract Subject headings
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  • Transition quadrupole moments, Qt, of two ultrahigh-spin, collective structures in 154Er have been measured for the first time using the Doppler Shift Attenuation Method (DSAM). Data were acquired at the ATLAS accelerator facility of Argonne National Laboratory, using the Gammasphere detector array. A thick, gold-backed 110Pd foil was bombarded by a beam of 48Ti ions at 215 MeV. The Qt for each band was determined from the Doppler shift of gamma rays emitted by the resulting recoil nuclei. The extracted transition quadrupole moments are significantly different in magnitude, suggesting the two structures in 154Er represent distinct exotic nuclear shapes, namely axial superdeformed (SD) with Q t 20 eb, and triaxial strongly deformed (TSD) with Qt ≈ 11 eb. Indeed, the results calibrate the quadrupole moments of TSD bands recently measured in light erbium nuclei, 157,158Er.

Subject headings

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

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