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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 orcid , 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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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
113
issue
9
article number
092501
pages
4 pages
publisher
American Physical Society
external identifiers
  • pmid:25215980
  • wos:000341292800008
  • scopus:84907303935
  • pmid:25215980
ISSN
1079-7114
DOI
10.1103/PhysRevLett.113.092501
project
Nuclear Structure at the Limits: Isotope-selective Spectroscopy
language
English
LU publication?
yes
id
9f9c3fe5-582c-4ee2-9f3d-a26ac510edbb (old id 4645690)
date added to LUP
2016-04-01 10:20:23
date last changed
2025-04-04 14:08:02
@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.}},
  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          = {{https://lup.lub.lu.se/search/files/1760825/4645745.pdf}},
  doi          = {{10.1103/PhysRevLett.113.092501}},
  volume       = {{113}},
  year         = {{2014}},
}