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Magnetic dipole bands in 190Hg : First evidence of excitations across the Z = 82 sub-shell in Hg nuclei

Wilson, A. N. (author)
University of York
Timár, J. (author)
Hungarian Academy of Sciences
Ahmad, I. (author)
Argonne National Laboratory
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Astier, A. (author)
Institute of Physics of 2 Infinities of Lyon
Azaiez, F. (author)
Institut de Physique Nucléaire Orsay (IPN) Orsay
Bergström, M. H. (author)
University of Liverpool
Blumenthal, D. J. (author)
Argonne National Laboratory
Crowell, B. (author)
Argonne National Laboratory
Carpenter, M. P. (author)
Argonne National Laboratory
Ducroux, L. (author)
Institute of Physics of 2 Infinities of Lyon
Gall, B. J.P. (author)
University of Strasbourg
Hannachi, F. (author)
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie - IJC Lab
Hübel, H. (author)
University of Bonn
Khoo, T. L. (author)
Argonne National Laboratory
Janssens, R. V.F. (author)
Argonne National Laboratory
Korichi, A. (author)
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie - IJC Lab
Lauritsen, T. (author)
Argonne National Laboratory
Lopez-Martens, A. (author)
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie - IJC Lab
Meyer, M. (author)
Institute of Physics of 2 Infinities of Lyon
Nisius, D. (author)
Argonne National Laboratory
Paul, E. S. (author)
University of Liverpool
Porquet, M. G. (author)
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie - IJC Lab
Redon, N. (author)
Institute of Physics of 2 Infinities of Lyon
Sharpey-Schafer, J. F. (author)
University of Strasbourg,University of Liverpool
Wadsworth, R. (author)
University of York
Wilson, J. N. (author)
University of Liverpool
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)
2001
2001
English 9 s.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 505:1-4, s. 6-14
Related links:
http://dx.doi.org/10...
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https://lup.lub.lu.s...
https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • An experiment aimed at studying high-spin states in 190Hg was performed with the Eurogam II array. The data have revealed the presence of cascades of magnetic dipole transitions with some unexpected properties. Unlike the MI bands previously observed in the heavier Hg isotopes, these structures have extremely large B(M1)/B(E2) ratios, The observation of a third dipole band with much lower B(M1)/B(E2) values in the same spin/excitation energy regime suggests that the bands may represent configurations occurring in different minima in the potential energy surface. Configuration-dependent Cranked Nilsson-Strutinsky calculations predict the presence of a minimum in the nuclear potential energy surface at a deformation of ε ≅ 0.2, γ ≅ -90°, occurring when a proton is excited across the Z = 82 shell-gap into an h9/2 orbital. It is suggested that the bands exhibiting anomalously large B(M1)/B(E2) ratios may be associated with this minimum.

Subject headings

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

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