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

O. S. Kirsebom; M. Hukkanen; Anu Kankainen; W. H. Trzaska; D. F. Stroemberg; G. Martinez-Pined; K. Andersen; E. Bodewits; B. A. Brown; L. Canete; J. Cederkall; T. Enqvist; Tommi Eronen; H. O. U. Fynbo; S. Geldhof; R. de Groote; D. G. Jenkins; Ari Jokinen; P. Joshi; A. Khanam; Joel Kostensalo; Pasi Kuusiniemi; K. Langanke; Iain Moore; M. Munch; D. A. Nesterenko; J. D. Ovejas; H. Penttilä; Tapio Pohjalainen; M. Reponen; S. Rinta-Antila; K. Riisager; A. de Roubin; P. Schotanus; P. C. Srivastava; Jouni Suhonen; J. A. Swartz; O. Tengblad; M. Vilen; S. Vinals; J. Aysto

doi:10.1103/PhysRevC.100.065805

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

O. S. Kirsebom^*
, M. Hukkanen
, Anu Kankainen
, W. H. Trzaska
, D. F. Stroemberg
, G. Martinez-Pined
, K. Andersen
, E. Bodewits
, B. A. Brown
, L. Canete
, J. Cederkall
, T. Enqvist
, Tommi Eronen
, H. O. U. Fynbo
, S. Geldhof
, R. de Groote
, D. G. Jenkins
, Ari Jokinen
, P. Joshi
, A. Khanam

Joel Kostensalo, Pasi Kuusiniemi, K. Langanke, Iain Moore, M. Munch, D. A. Nesterenko, J. D. Ovejas, H. Penttilä, Tapio Pohjalainen, M. Reponen, S. Rinta-Antila, K. Riisager, A. de Roubin, P. Schotanus, P. C. Srivastava, Jouni Suhonen, J. A. Swartz, O. Tengblad, M. Vilen, S. Vinals, J. Aysto

^*Corresponding author for this work

Department of Applied Physics

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Abstract

We report the first detection of the second-forbidden, nonunique, 2(+) -> 0(+), ground-state transition in the beta decay of F-20. A low-energy, mass-separated F-20(+) beam produced at the IGISOL facility in Jyvaskyla, Finland, was implanted in a thin carbon foil and the beta spectrum measured using a magnetic transporter and a plastic-scintillator detector. The beta-decay branching ratio inferred from the measurement is b(beta) = [0.41 +/- 0.08(stat) +/- 0.07(sys)] x 10(-5) corresponding to log ft = 10.89(11), making this one of the strongest second-forbidden, nonunique beta 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 Ne-20 is now known to within better than 25% at the relevant temperatures and densities.

Original language	English
Article number	065805
Pages (from-to)	1-12
Number of pages	12
Journal	Physical Review C
Volume	100
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.100.065805
Publication status	Published - 24 Dec 2019
MoE publication type	A1 Journal article-refereed

Funding

We are greatly indebted to the technical staff at the JYFL laboratory and Aarhus University who contributed with their time and expertise to the refurbishment of the spectrometer. We thank F. Lyckegaard for making the BaF<INF>2</INF> targets, H. Kettunen for preparing the catcher foil, and E. Nacher for providing technical support with the GEANT4 simulations. Finally, we thank C. Matteuzzi, M. Anghinolfi, P. Hansen, R. Julin, and T. Kibedi for valuable advice and encouragement in the early phases of the project. This work has been supported by the Academy of Finland under the Finnish Centre of Excellence Programme (Nuclear and Accelerator Based Physics Research at JYFL 2012-2017) and Academy of Finland Grants No. 275389, No. 284516, No. 295207, and No. 312544. D.F.S. and G.M.-P. acknowledge the support of the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)-Projektnummer 279384907-SFB 1245 "Nuclei: From Fundamental Interactions to Structure and Stars"; and the ChETEC COST action (CA16117), funded by COST (European Cooperation in Science and Technology). This project has been partly supported by the Spanish Ministry MINECO through the grant FPA2015-64969-P and has received funding from the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 654002 (ENSAR2). O.S.K. acknowledges support from the Villum Foundation through Project No. 10117. P.C.S. acknowledges the support from the Faculty Initiation Grant (FIG) provided by IIT Roorkee. A.K. and M.H. acknowledge the support from the European Union's Horizon 2020 research and innovation program under Grant Agreement No. 771036 (ERC CoG MAIDEN). B.A.B. acknowledges the support from NSF Grant PHY-1811855.

Keywords

ELEMENTS

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Kirsebom, O. S., Hukkanen, M., Kankainen, A., Trzaska, W. H., Stroemberg, D. F., Martinez-Pined, G., Andersen, K., Bodewits, E., Brown, B. A., Canete, L., Cederkall, J., Enqvist, T., Eronen, T., Fynbo, H. O. U., Geldhof, S., de Groote, R., Jenkins, D. G., Jokinen, A., Joshi, P., ... Aysto, J. (2019). Measurement of the 2+→0+ ground-state transition in the β decay of F 20. Physical Review C , 100(6), 1-12. Article 065805. https://doi.org/10.1103/PhysRevC.100.065805

@article{4d3057fbc07d4dbdae84b138b8c3a19a,

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

abstract = "We report the first detection of the second-forbidden, nonunique, 2(+) -> 0(+), ground-state transition in the beta decay of F-20. A low-energy, mass-separated F-20(+) beam produced at the IGISOL facility in Jyvaskyla, Finland, was implanted in a thin carbon foil and the beta spectrum measured using a magnetic transporter and a plastic-scintillator detector. The beta-decay branching ratio inferred from the measurement is b(beta) = [0.41 +/- 0.08(stat) +/- 0.07(sys)] x 10(-5) corresponding to log ft = 10.89(11), making this one of the strongest second-forbidden, nonunique beta 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 Ne-20 is now known to within better than 25\% at the relevant temperatures and densities.",

keywords = "ELEMENTS",

author = "Kirsebom, \{O. S.\} and M. Hukkanen and Anu Kankainen and Trzaska, \{W. H.\} and Stroemberg, \{D. F.\} and G. Martinez-Pined and K. Andersen and E. Bodewits and Brown, \{B. A.\} and L. Canete and J. Cederkall and T. Enqvist and Tommi Eronen and Fynbo, \{H. O. U.\} and S. Geldhof and \{de Groote\}, R. and Jenkins, \{D. G.\} and Ari Jokinen and P. Joshi and A. Khanam and Joel Kostensalo and Pasi Kuusiniemi and K. Langanke and Iain Moore and M. Munch and Nesterenko, \{D. A.\} and Ovejas, \{J. D.\} and H. Penttil{\"a} and Tapio Pohjalainen and M. Reponen and S. Rinta-Antila and K. Riisager and \{de Roubin\}, A. and P. Schotanus and Srivastava, \{P. C.\} and Jouni Suhonen and Swartz, \{J. A.\} and O. Tengblad and M. Vilen and S. Vinals and J. Aysto",

note = "| openaire: EC/H2020/654002/EU//ENSAR2 ",

year = "2019",

month = dec,

day = "24",

doi = "10.1103/PhysRevC.100.065805",

language = "English",

volume = "100",

pages = "1--12",

journal = "Physical Review C ",

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Kirsebom, OS, Hukkanen, M, Kankainen, A, Trzaska, WH, Stroemberg, DF, Martinez-Pined, G, Andersen, K, Bodewits, E, Brown, BA, Canete, L, Cederkall, J, Enqvist, T, Eronen, T, Fynbo, HOU, Geldhof, S, de Groote, R, Jenkins, DG, Jokinen, A, Joshi, P, Khanam, A, Kostensalo, J, Kuusiniemi, P, Langanke, K, Moore, I, Munch, M, Nesterenko, DA, Ovejas, JD, Penttilä, H, Pohjalainen, T, Reponen, M, Rinta-Antila, S, Riisager, K, de Roubin, A, Schotanus, P, Srivastava, PC, Suhonen, J, Swartz, JA, Tengblad, O, Vilen, M, Vinals, S & Aysto, J 2019, 'Measurement of the 2+→0+ ground-state transition in the β decay of F 20', Physical Review C , vol. 100, no. 6, 065805, pp. 1-12. https://doi.org/10.1103/PhysRevC.100.065805

TY - JOUR

T1 - Measurement of the 2+→0+ ground-state transition in the β decay of F 20

AU - Kirsebom, O. S.

AU - Hukkanen, M.

AU - Kankainen, Anu

AU - Trzaska, W. H.

AU - Stroemberg, D. F.

AU - Martinez-Pined, G.

AU - Andersen, K.

AU - Bodewits, E.

AU - Brown, B. A.

AU - Canete, L.

AU - Cederkall, J.

AU - Enqvist, T.

AU - Eronen, Tommi

AU - Fynbo, H. O. U.

AU - Geldhof, S.

AU - de Groote, R.

AU - Jenkins, D. G.

AU - Jokinen, Ari

AU - Joshi, P.

AU - Khanam, A.

AU - Kostensalo, Joel

AU - Kuusiniemi, Pasi

AU - Langanke, K.

AU - Moore, Iain

AU - Munch, M.

AU - Nesterenko, D. A.

AU - Ovejas, J. D.

AU - Penttilä, H.

AU - Pohjalainen, Tapio

AU - Reponen, M.

AU - Rinta-Antila, S.

AU - Riisager, K.

AU - de Roubin, A.

AU - Schotanus, P.

AU - Srivastava, P. C.

AU - Suhonen, Jouni

AU - Swartz, J. A.

AU - Tengblad, O.

AU - Vilen, M.

AU - Vinals, S.

AU - Aysto, J.

N1 - | openaire: EC/H2020/654002/EU//ENSAR2

PY - 2019/12/24

Y1 - 2019/12/24

N2 - We report the first detection of the second-forbidden, nonunique, 2(+) -> 0(+), ground-state transition in the beta decay of F-20. A low-energy, mass-separated F-20(+) beam produced at the IGISOL facility in Jyvaskyla, Finland, was implanted in a thin carbon foil and the beta spectrum measured using a magnetic transporter and a plastic-scintillator detector. The beta-decay branching ratio inferred from the measurement is b(beta) = [0.41 +/- 0.08(stat) +/- 0.07(sys)] x 10(-5) corresponding to log ft = 10.89(11), making this one of the strongest second-forbidden, nonunique beta 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 Ne-20 is now known to within better than 25% at the relevant temperatures and densities.

AB - We report the first detection of the second-forbidden, nonunique, 2(+) -> 0(+), ground-state transition in the beta decay of F-20. A low-energy, mass-separated F-20(+) beam produced at the IGISOL facility in Jyvaskyla, Finland, was implanted in a thin carbon foil and the beta spectrum measured using a magnetic transporter and a plastic-scintillator detector. The beta-decay branching ratio inferred from the measurement is b(beta) = [0.41 +/- 0.08(stat) +/- 0.07(sys)] x 10(-5) corresponding to log ft = 10.89(11), making this one of the strongest second-forbidden, nonunique beta 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 Ne-20 is now known to within better than 25% at the relevant temperatures and densities.

KW - ELEMENTS

UR - https://journals.aps.org/prc/abstract/10.1103/PhysRevC.100.065805

U2 - 10.1103/PhysRevC.100.065805

DO - 10.1103/PhysRevC.100.065805

M3 - Article

SN - 2469-9985

VL - 100

SP - 1

EP - 12

JO - Physical Review C

JF - Physical Review C

IS - 6

M1 - 065805

ER -

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

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