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Testing mean-field ...
Testing mean-field models near the N=Z line : gamma-ray spectroscopy of the T-z=1/2 nucleus Kr-73
- Article/chapterEnglish2002
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LIBRIS-ID:oai:DiVA.org:kth-21489
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-21489URI
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https://doi.org/10.1103/PhysRevC.65.044331DOI
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https://lup.lub.lu.se/record/910044URI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20100525
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Excited states in the N=Z+1 nucleus Kr-73 have been investigated using the Ca-40(Ar-36,2pn) and Ca-40(Ca-40,alpha2pn) reactions at 145 and 160 MeV, respectively. gamma rays were detected using the Gammasphere array and events were recorded in coincidence with charged-particle and neutron detectors. The three previously observed bands were extended to high spin, and a new unfavored positive-parity band has been observed. The alignment characteristics and decay properties of the bands are all consistent with large-deformation prolate rotation, with no clear evidence for oblate bands or shape coexistence. This is quite different from neighboring Kr-72,Kr-74, indicating a strong shape-stabilizing role for the valence neutron. The experimental results are compared to extended total Routhian surface, cranked Nilsson Strutinsky, and cranked relativistic mean-field calculations. The results suggest that the paired calculations lack some important physics. Neutron-proton correlations may be the missing ingredient. There is also evidence for an unusual band crossing in the negative-parity bands, which may indicate the presence of T=0 pairing correlations. At high spin all the models can reproduce the experimental data.
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Fischer, S. M.
(author)
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Balamuth, D. P.
(author)
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Ball, G. C.
(author)
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Carpenter, M. P.
(author)
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Clark, R. M.
(author)
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Durell, J.
(author)
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Fallon, P.
(author)
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Freeman, S. J.
(author)
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Hausladen, P. A.
(author)
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Janssens, R. V. F.
(author)
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Jenkins, D. G.
(author)
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Leddy, M. J.
(author)
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Lister, C. J.
(author)
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Macchiavelli, A. O.
(author)
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Sarantites, D. G.
(author)
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Schmidt, D. C.
(author)
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Seweryniak, D.
(author)
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Svensson, C. E.
(author)
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Varley, B. J.
(author)
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Vincent, S.
(author)
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Wadsworth, R.
(author)
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Wilson, A. N.
(author)
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Afanasjev, A. V.
(author)
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Frauendorf, S.
(author)
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Ragnarsson, IngemarLund 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(Swepub:lu)matf-ira
(author)
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Wyss, RamonKTH,Fysik(Swepub:kth)u1ayc3r9
(author)
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Matematisk fysikFysiska institutionen
(creator_code:org_t)
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In:Physical Review C. Nuclear Physics65:40556-28131089-490X
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Kelsall, N. S.
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Fischer, S. M.
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Balamuth, D. P.
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Ball, G. C.
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Carpenter, M. P.
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Clark, R. M.
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show more...
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Durell, J.
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Fallon, P.
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Freeman, S. J.
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Hausladen, P. A.
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Janssens, R. V. ...
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Jenkins, D. G.
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Leddy, M. J.
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Lister, C. J.
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Macchiavelli, A. ...
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Sarantites, D. G ...
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Schmidt, D. C.
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Seweryniak, D.
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Svensson, C. E.
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Varley, B. J.
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Vincent, S.
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Wadsworth, R.
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Wilson, A. N.
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Afanasjev, A. V.
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Frauendorf, S.
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Ragnarsson, Inge ...
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Wyss, Ramon
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- NATURAL SCIENCES
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Royal Institute of Technology
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Lund University