Physics Letters B (Jun 2019)
Investigation of the Δn = 0 selection rule in Gamow-Teller transitions: The β-decay of 207Hg
- T.A. Berry,
- Zs. Podolyák,
- R.J. Carroll,
- R. Lică,
- H. Grawe,
- N.K. Timofeyuk,
- T. Alexander,
- A.N. Andreyev,
- S. Ansari,
- M.J.G. Borge,
- J. Creswell,
- C. Fahlander,
- L.M. Fraile,
- H.O.U. Fynbo,
- W. Gelletly,
- R.-B. Gerst,
- M. Górska,
- A. Gredley,
- P. Greenlees,
- L.J. Harkness-Brennan,
- M. Huyse,
- S.M. Judge,
- D.S. Judson,
- J. Konki,
- J. Kurcewicz,
- I. Kuti,
- S. Lalkovski,
- I. Lazarus,
- M. Lund,
- M. Madurga,
- N. Mărginean,
- R. Mărginean,
- I. Marroquin,
- C. Mihai,
- R.E. Mihai,
- E. Nácher,
- S. Nae,
- A. Negret,
- C. Niţă,
- R.D. Page,
- S. Pascu,
- Z. Patel,
- A. Perea,
- V. Pucknell,
- P. Rahkila,
- E. Rapisarda,
- P.H. Regan,
- F. Rotaru,
- C.M. Shand,
- E.C. Simpson,
- Ch. Sotty,
- S. Stegemann,
- T. Stora,
- O. Tengblad,
- A. Turturica,
- P. Van Duppen,
- V. Vedia,
- R. Wadsworth,
- P.M. Walker,
- N. Warr,
- F. Wearing,
- H. De Witte
Affiliations
- T.A. Berry
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom; Corresponding author.
- Zs. Podolyák
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- R.J. Carroll
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- R. Lică
- CERN, Physics Department, 1211 Geneva 23, Switzerland; H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
- H. Grawe
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany
- N.K. Timofeyuk
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- T. Alexander
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- A.N. Andreyev
- Department of Physics, University of York, York YO10 5DD, N Yorkshire, United Kingdom
- S. Ansari
- Institut für Kernphysik der Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
- M.J.G. Borge
- CERN, Physics Department, 1211 Geneva 23, Switzerland; Instituto de Estructura de la Materia, CSIC, Serrano 113 bis, E-28006 Madrid, Spain
- J. Creswell
- STFC, Daresbury Laboratory, Warrington, WA4 4AD, United Kingdom
- C. Fahlander
- Department of Physics, Lund University, S-22100, Lund, Sweden
- L.M. Fraile
- Grupo de Física Nuclear & IPARCOS, FAMN, Universidad Complutense de Madrid, CEI Moncloa, 28040 Madrid, Spain
- H.O.U. Fynbo
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus, Denmark
- W. Gelletly
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- R.-B. Gerst
- Institut für Kernphysik der Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
- M. Górska
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, 64291 Darmstadt, Germany
- A. Gredley
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
- P. Greenlees
- Department of Physics, PO Box 35 (YFL), FI-40014 University of Jyväskylä, Finland
- L.J. Harkness-Brennan
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
- M. Huyse
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
- S.M. Judge
- National Physical Laboratory, Teddington, Middlesex, TW11 0LW, United Kingdom
- D.S. Judson
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
- J. Konki
- Department of Physics, PO Box 35 (YFL), FI-40014 University of Jyväskylä, Finland; Helsinki Institute of Physics, University of Helsinki, FIN-00014 Helsinki, Finland; CERN, Physics Department, 1211 Geneva 23, Switzerland
- J. Kurcewicz
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- I. Kuti
- Institute of Nuclear Research of the Hungarian Academy of Sciences, 4026 Debrecen, Hungary
- S. Lalkovski
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- I. Lazarus
- STFC, Daresbury Laboratory, Warrington, WA4 4AD, United Kingdom
- M. Lund
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus, Denmark
- M. Madurga
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- N. Mărginean
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
- R. Mărginean
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
- I. Marroquin
- Instituto de Estructura de la Materia, CSIC, Serrano 113 bis, E-28006 Madrid, Spain
- C. Mihai
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
- R.E. Mihai
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
- E. Nácher
- Instituto de Estructura de la Materia, CSIC, Serrano 113 bis, E-28006 Madrid, Spain
- S. Nae
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
- A. Negret
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
- C. Niţă
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania; School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom
- R.D. Page
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
- S. Pascu
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
- Z. Patel
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- A. Perea
- Instituto de Estructura de la Materia, CSIC, Serrano 113 bis, E-28006 Madrid, Spain
- V. Pucknell
- STFC, Daresbury Laboratory, Warrington, WA4 4AD, United Kingdom
- P. Rahkila
- Department of Physics, PO Box 35 (YFL), FI-40014 University of Jyväskylä, Finland
- E. Rapisarda
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- P.H. Regan
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom; National Physical Laboratory, Teddington, Middlesex, TW11 0LW, United Kingdom
- F. Rotaru
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
- C.M. Shand
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- E.C. Simpson
- Department of Nuclear Physics, Australian National University, Canberra, Australian Capital Territory 2601, Australia
- Ch. Sotty
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania; KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
- S. Stegemann
- Institut für Kernphysik der Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
- T. Stora
- CERN, Physics Department, 1211 Geneva 23, Switzerland
- O. Tengblad
- Instituto de Estructura de la Materia, CSIC, Serrano 113 bis, E-28006 Madrid, Spain
- A. Turturica
- H. Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
- P. Van Duppen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
- V. Vedia
- Grupo de Física Nuclear & IPARCOS, FAMN, Universidad Complutense de Madrid, CEI Moncloa, 28040 Madrid, Spain
- R. Wadsworth
- Department of Physics, University of York, York YO10 5DD, N Yorkshire, United Kingdom
- P.M. Walker
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- N. Warr
- Institut für Kernphysik der Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
- F. Wearing
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
- H. De Witte
- KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
- Journal volume & issue
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Vol. 793
pp. 271 – 275
Abstract
Gamow-Teller β decay is forbidden if the number of nodes in the radial wave functions of the initial and final states is different. This Δn=0 requirement plays a major role in the β decay of heavy neutron-rich nuclei, affecting the nucleosynthesis through the increased half-lives of nuclei on the astrophysical r-process pathway below both Z=50 (for N>82) and Z=82 (for N>126). The level of forbiddenness of the Δn=1ν1g9/2→π0g7/2 transition has been investigated from the β− decay of the ground state of 207Hg into the single-proton-hole nucleus 207Tl in an experiment at the ISOLDE Decay Station. From statistical observational limits on possible γ-ray transitions depopulating the π0g7/2−1 state in 207Tl, an upper limit of 3.9×10−3% was obtained for the probability of this decay, corresponding to logft>8.8 within a 95% confidence limit. This is the most stringent test of the Δn=0 selection rule to date.
