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Hindered Gamow-Teller Decay to the Odd-Odd N=Z 62Ga: Absence of Proton-Neutron T=0 Condensate in A=62

Grodner, E. (author)
Gadea, A. (author)
Sarriguren, P. (author)
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Lenzi, S. M. (author)
Grebosz, J. (author)
Valiente-Dobón, J. J. (author)
Algora, A. (author)
Górska, M. (author)
Regan, P. H. (author)
Rudolph, Dirk (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
de Angelis, G. (author)
Agramunt, J. (author)
Alkhomashi, N. (author)
Amon Susam, L. (author)
Bazzacco, D. (author)
Benlliure, J. (author)
Benzoni, G. (author)
Boutachkov, P. (author)
Bracco, A. (author)
Caceres, L. (author)
Cakirli, R. B. (author)
Crespi, F. C. L. (author)
Domingo-Pardo, C. (author)
Doncel, M. (author)
Dombrádi, Zs. (author)
Doornenbal, P. (author)
Farnea, E. (author)
Ganioğlu, E. (author)
Gelletly, W. (author)
Gerl, J. (author)
Gottardo, A. (author)
Hüyük, T. (author)
Kurz, N. (author)
Leoni, S. (author)
Mengoni, D. (author)
Molina, F. (author)
Morales, A. I. (author)
Orlandi, R. (author)
Oktem, Y. (author)
Page, R. D. (author)
Perez, D. (author)
Pietri, S. (author)
Podolyák, Zs. (author)
Poves, A. (author)
Quintana, B. (author)
Rinta-Antila, S. (author)
Rubio, B. (author)
Nara Singh, B. S. (author)
Steer, A. N. (author)
Verma, S. (author)
Wadsworth, R. (author)
Wieland, O. (author)
Wollersheim, H. J. (author)
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 (creator_code:org_t)
2014
2014
English 4 s.
In: Physical Review Letters. - 1079-7114. ; 113:9
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Search for a new kind of superfluidity built on collective proton-neutron pairs with aligned spin is performed studying the Gamow-Teller decay of the T=1, Jπ=0+ ground state of Ge62 into excited states of the odd-odd N=Z nucleus Ga62. The experiment is performed at GSI Helmholtzzentrum für Schwerionenforschung with the Ge62 ions selected by the fragment separator and implanted in a stack of Si-strip detectors, surrounded by the RISING Ge array. A half-life of T1/2=82.9(14) ms is measured for the Ge62 ground state. Six excited states of Ga62, populated below 2.5 MeV through Gamow-Teller transitions, are identified. Individual Gamow-Teller transition strengths agree well with theoretical predictions of the interacting shell model and the quasiparticle random phase approximation. The absence of any sizable low-lying Gamow-Teller strength in the reported beta-decay experiment supports the hypothesis of a negligible role of coherent T=0 proton-neutron correlations in Ga62.

Subject headings

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

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