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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.; Gadea, A.; Sarriguren, P.; Lenzi, S. M.; Grebosz, J.; Valiente-Dobón, J. J.; Algora, A.; Górska, M.; Regan, P. H. and Rudolph, Dirk LU , et al. (2014) In Physical Review Letters 113(9).
Abstract
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... (More)
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. (Less)
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Physical Review Letters
volume
113
issue
9
publisher
American Physical Society
external identifiers
  • pmid:25215980
  • wos:000341292800008
  • scopus:84907303935
ISSN
1079-7114
DOI
10.1103/PhysRevLett.113.092501
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English
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yes
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9f9c3fe5-582c-4ee2-9f3d-a26ac510edbb (old id 4645690)
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@article{9f9c3fe5-582c-4ee2-9f3d-a26ac510edbb,
  abstract     = {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.},
  articleno    = {092501},
  author       = {Grodner, E. and Gadea, A. and Sarriguren, P. and Lenzi, S. M. and Grebosz, J. and Valiente-Dobón, J. J. and Algora, A. and Górska, M. and Regan, P. H. and Rudolph, Dirk and de Angelis, G. and Agramunt, J. and Alkhomashi, N. and Amon Susam, L. and Bazzacco, D. and Benlliure, J. and Benzoni, G. and Boutachkov, P. and Bracco, A. and Caceres, L. and Cakirli, R. B. and Crespi, F. C. L. and Domingo-Pardo, C. and Doncel, M. and Dombrádi, Zs. and Doornenbal, P. and Farnea, E. and Ganioğlu, E. and Gelletly, W. and Gerl, J. and Gottardo, A. and Hüyük, T. and Kurz, N. and Leoni, S. and Mengoni, D. and Molina, F. and Morales, A. I. and Orlandi, R. and Oktem, Y. and Page, R. D. and Perez, D. and Pietri, S. and Podolyák, Zs. and Poves, A. and Quintana, B. and Rinta-Antila, S. and Rubio, B. and Nara Singh, B. S. and Steer, A. N. and Verma, S. and Wadsworth, R. and Wieland, O. and Wollersheim, H. J.},
  issn         = {1079-7114},
  language     = {eng},
  number       = {9},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Hindered Gamow-Teller Decay to the Odd-Odd N=Z 62Ga: Absence of Proton-Neutron T=0 Condensate in A=62},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.113.092501},
  volume       = {113},
  year         = {2014},
}