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Measurement of the 2+→0+ ground-state transition in the β decay of F 20

Kirsebom, O. S. ; Hukkanen, M. ; Kankainen, A. ; Trzaska, W. H. ; Strömberg, D. F. ; Martínez-Pinedo, G. ; Andersen, K. ; Bodewits, E. ; Brown, B. A. and Canete, L. , et al. (2019) In Physical Review C 100(6).
Abstract

We report the first detection of the second-forbidden, nonunique, 2+→0+, ground-state transition in the β decay of F20. A low-energy, mass-separated F+20 beam produced at the IGISOL facility in Jyväskylä, Finland, was implanted in a thin carbon foil and the β spectrum measured using a magnetic transporter and a plastic-scintillator detector. The β-decay branching ratio inferred from the measurement is bβ=[0.41±0.08(stat)±0.07(sys)]×10-5 corresponding to logft=10.89(11), making this one of the strongest second-forbidden, nonunique β transitions ever measured. The experimental result is supported by shell-model calculations and has significant implications for the final evolution of stars that develop degenerate oxygen-neon cores. Using... (More)

We report the first detection of the second-forbidden, nonunique, 2+→0+, ground-state transition in the β decay of F20. A low-energy, mass-separated F+20 beam produced at the IGISOL facility in Jyväskylä, Finland, was implanted in a thin carbon foil and the β spectrum measured using a magnetic transporter and a plastic-scintillator detector. The β-decay branching ratio inferred from the measurement is bβ=[0.41±0.08(stat)±0.07(sys)]×10-5 corresponding to logft=10.89(11), making this one of the strongest second-forbidden, nonunique β transitions ever measured. The experimental result is supported by shell-model calculations and has significant implications for the final evolution of stars that develop degenerate oxygen-neon cores. Using the new experimental data, we argue that the astrophysical electron-capture rate on Ne20 is now known to within better than 25% at the relevant temperatures and densities.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C
volume
100
issue
6
article number
065805
publisher
American Physical Society
external identifiers
  • scopus:85077336489
ISSN
2469-9985
DOI
10.1103/PhysRevC.100.065805
language
English
LU publication?
yes
id
8a003ef8-cc66-46a8-8b25-c5137d12c894
date added to LUP
2020-01-17 12:33:51
date last changed
2022-04-18 19:59:51
@article{8a003ef8-cc66-46a8-8b25-c5137d12c894,
  abstract     = {{<p>We report the first detection of the second-forbidden, nonunique, 2+→0+, ground-state transition in the β decay of F20. A low-energy, mass-separated F+20 beam produced at the IGISOL facility in Jyväskylä, Finland, was implanted in a thin carbon foil and the β spectrum measured using a magnetic transporter and a plastic-scintillator detector. The β-decay branching ratio inferred from the measurement is bβ=[0.41±0.08(stat)±0.07(sys)]×10-5 corresponding to logft=10.89(11), making this one of the strongest second-forbidden, nonunique β transitions ever measured. The experimental result is supported by shell-model calculations and has significant implications for the final evolution of stars that develop degenerate oxygen-neon cores. Using the new experimental data, we argue that the astrophysical electron-capture rate on Ne20 is now known to within better than 25% at the relevant temperatures and densities.</p>}},
  author       = {{Kirsebom, O. S. and Hukkanen, M. and Kankainen, A. and Trzaska, W. H. and Strömberg, D. F. and Martínez-Pinedo, G. and Andersen, K. and Bodewits, E. and Brown, B. A. and Canete, L. and Cederkäll, J. and Enqvist, T. and Eronen, T. and Fynbo, H. O.U. and Geldhof, S. and De Groote, R. and Jenkins, D. G. and Jokinen, A. and Joshi, P. and Khanam, A. and Kostensalo, J. and Kuusiniemi, P. and Langanke, K. and Moore, I. and Munch, M. and Nesterenko, D. A. and Ovejas, J. D. and Penttilä, H. and Pohjalainen, I. and Reponen, M. and Rinta-Antila, S. and Riisager, K. and De Roubin, A. and Schotanus, P. and Srivastava, P. C. and Suhonen, J. and Swartz, J. A. and Tengblad, O. and Vilen, M. and Vínals, S. and Aÿstö, J.}},
  issn         = {{2469-9985}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{6}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Measurement of the 2+→0+ ground-state transition in the β decay of F 20}},
  url          = {{http://dx.doi.org/10.1103/PhysRevC.100.065805}},
  doi          = {{10.1103/PhysRevC.100.065805}},
  volume       = {{100}},
  year         = {{2019}},
}