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

O. S. Kirsebom; M. Hukkanen; A. Kankainen; W. H. Trzaska; D. F. Strömberg; G. Martínez-Pinedo; K. Andersen; E. Bodewits; B. A. Brown; L. Canete; J. Cederkäll; T. Enqvist; T. Eronen; H. O.U. Fynbo; S. Geldhof; R. De Groote; D. G. Jenkins; A. Jokinen; P. Joshi; A. Khanam; J. Kostensalo; P. Kuusiniemi; K. Langanke; I. Moore; M. Munch; D. A. Nesterenko; J. D. Ovejas; H. Penttilä; I. Pohjalainen; M. Reponen; S. Rinta-Antila; K. Riisager; A. De Roubin; P. Schotanus; P. C. Srivastava; J. Suhonen; J. A. Swartz; O. Tengblad; M. Vilen; S. Vínals; J. Aÿstö

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, A. Kankainen, W. H. Trzaska, D. F. Strömberg, G. Martínez-Pinedo, K. Andersen, E. Bodewits, B. A. Brown, L. Canete, J. Cederkäll, T. Enqvist, T. Eronen, H. O.U. Fynbo, S. Geldhof, R. De Groote, D. G. Jenkins, A. Jokinen, P. Joshi, A. KhanamJ. Kostensalo, P. Kuusiniemi, K. Langanke, I. Moore, M. Munch, D. A. Nesterenko, J. D. Ovejas, H. Penttilä, I. Pohjalainen, M. Reponen, S. Rinta-Antila, K. Riisager, A. De Roubin, P. Schotanus, P. C. Srivastava, J. Suhonen, J. A. Swartz, O. Tengblad, M. Vilen, S. Vínals, J. Aÿstö

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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 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.

Original language	English
Article number	065805
Journal	Physical Review C
Volume	100
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.100.065805
Publication status	Published - 2019 Dec 24

Subject classification (UKÄ)

Subatomic Physics

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

@article{8a003ef8cc6646a88b25c5137d12c894,

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 β decay of F20. A low-energy, mass-separated F+20 beam produced at the IGISOL facility in Jyv{\"a}skyl{\"a}, 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.",

author = "Kirsebom, {O. S.} and M. Hukkanen and A. Kankainen and Trzaska, {W. H.} and Str{\"o}mberg, {D. F.} and G. Mart{\'i}nez-Pinedo and K. Andersen and E. Bodewits and Brown, {B. A.} and L. Canete and J. Cederk{\"a}ll and T. Enqvist and T. Eronen and Fynbo, {H. O.U.} and S. Geldhof and {De Groote}, R. and Jenkins, {D. G.} and A. Jokinen and P. Joshi and A. Khanam and J. Kostensalo and P. Kuusiniemi and K. Langanke and I. Moore and M. Munch and Nesterenko, {D. A.} and Ovejas, {J. D.} and H. Penttil{\"a} and I. Pohjalainen and M. Reponen and S. Rinta-Antila and K. Riisager and {De Roubin}, A. and P. Schotanus and Srivastava, {P. C.} and J. Suhonen and Swartz, {J. A.} and O. Tengblad and M. Vilen and S. V{\'i}nals and J. A{\"y}st{\"o}",

year = "2019",

month = dec,

day = "24",

doi = "10.1103/PhysRevC.100.065805",

language = "English",

volume = "100",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

}

Kirsebom, OS, Hukkanen, M, Kankainen, A, Trzaska, WH, Strömberg, DF, Martínez-Pinedo, G, Andersen, K, Bodewits, E, Brown, BA, Canete, L, Cederkäll, 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, I, Reponen, M, Rinta-Antila, S, Riisager, K, De Roubin, A, Schotanus, P, Srivastava, PC, Suhonen, J, Swartz, JA, Tengblad, O, Vilen, M, Vínals, S & Aÿstö, 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. 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, A.

AU - Trzaska, W. H.

AU - Strömberg, D. F.

AU - Martínez-Pinedo, G.

AU - Andersen, K.

AU - Bodewits, E.

AU - Brown, B. A.

AU - Canete, L.

AU - Cederkäll, J.

AU - Enqvist, T.

AU - Eronen, T.

AU - Fynbo, H. O.U.

AU - Geldhof, S.

AU - De Groote, R.

AU - Jenkins, D. G.

AU - Jokinen, A.

AU - Joshi, P.

AU - Khanam, A.

AU - Kostensalo, J.

AU - Kuusiniemi, P.

AU - Langanke, K.

AU - Moore, I.

AU - Munch, M.

AU - Nesterenko, D. A.

AU - Ovejas, J. D.

AU - Penttilä, H.

AU - Pohjalainen, I.

AU - Reponen, M.

AU - Rinta-Antila, S.

AU - Riisager, K.

AU - De Roubin, A.

AU - Schotanus, P.

AU - Srivastava, P. C.

AU - Suhonen, J.

AU - Swartz, J. A.

AU - Tengblad, O.

AU - Vilen, M.

AU - Vínals, S.

AU - Aÿstö, J.

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 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.

AB - 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.

U2 - 10.1103/PhysRevC.100.065805

DO - 10.1103/PhysRevC.100.065805

M3 - Article

AN - SCOPUS:85077336489

SN - 2469-9985

VL - 100

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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