Measurement of the cross section for the 4He(α, n)7Be reaction as a possible solution to the cosmological lithium problem

T. Kawabata; T. Furuno; M. Ichikawa; N. Iwasa; Y. Kanada-En'Yo; A. Koshikawa; S. Kubono; E. Miyawaki; T. Morimoto; M. Murata; T. Nanamura; S. Nishimura; Y. Shikata; Y. Takahashi; T. Takeda; M. Tsumura; K. Watanabe

doi:10.1088/1742-6596/863/1/012073

Measurement of the cross section for the ⁴He(α, n)⁷Be reaction as a possible solution to the cosmological lithium problem

T. Kawabata, T. Furuno, M. Ichikawa, N. Iwasa, Y. Kanada-En'Yo, A. Koshikawa, S. Kubono, E. Miyawaki, T. Morimoto, M. Murata, T. Nanamura, S. Nishimura, Y. Shikata, Y. Takahashi, T. Takeda, M. Tsumura, K. Watanabe

SCI - Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

The cross section for the ⁴He(α,n)⁷Be reaction was measured at low energies between E_α = 38.50 and 39.64 MeV motivated by the cosmological lithium problem. On the basis of the detailed balance principle, the cross section for the ⁷Be(n,α)⁴He reaction was obtained at E_c.m. = 0.20-0.81 MeV close to the Big Bang nucleosynthesis (BBN) energy window for the first time. The obtained cross sections are significantly smaller than the theoretical estimation widely used in the BBN calculations. The present results suggest the ⁷Be(n,α)⁴He reaction rate is not large enough to solve the cosmological lithium problem.

Original language	English
Article number	012073
Journal	Journal of Physics: Conference Series
Volume	863
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/863/1/012073
Publication status	Published - 2017 Jul 4
Event	11th International Conference on Clustering Aspects of Nuclear Structure and Dynamics, CLUSTER 2016 - Napoli, Italy Duration: 2016 May 23 → 2016 May 27

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1088/1742-6596/863/1/012073

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Kawabata, T., Furuno, T., Ichikawa, M., Iwasa, N., Kanada-En'Yo, Y., Koshikawa, A., Kubono, S., Miyawaki, E., Morimoto, T., Murata, M., Nanamura, T., Nishimura, S., Shikata, Y., Takahashi, Y., Takeda, T., Tsumura, M., & Watanabe, K. (2017). Measurement of the cross section for the ⁴He(α, n)⁷Be reaction as a possible solution to the cosmological lithium problem. Journal of Physics: Conference Series, 863(1), [012073]. https://doi.org/10.1088/1742-6596/863/1/012073

Kawabata, T, Furuno, T, Ichikawa, M, Iwasa, N, Kanada-En'Yo, Y, Koshikawa, A, Kubono, S, Miyawaki, E, Morimoto, T, Murata, M, Nanamura, T, Nishimura, S, Shikata, Y, Takahashi, Y, Takeda, T, Tsumura, M & Watanabe, K 2017, 'Measurement of the cross section for the ⁴He(α, n)⁷Be reaction as a possible solution to the cosmological lithium problem', Journal of Physics: Conference Series, vol. 863, no. 1, 012073. https://doi.org/10.1088/1742-6596/863/1/012073

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title = "Measurement of the cross section for the 4He(α, n)7Be reaction as a possible solution to the cosmological lithium problem",

abstract = "The cross section for the 4He(α,n)7Be reaction was measured at low energies between Eα = 38.50 and 39.64 MeV motivated by the cosmological lithium problem. On the basis of the detailed balance principle, the cross section for the 7Be(n,α)4He reaction was obtained at Ec.m. = 0.20-0.81 MeV close to the Big Bang nucleosynthesis (BBN) energy window for the first time. The obtained cross sections are significantly smaller than the theoretical estimation widely used in the BBN calculations. The present results suggest the 7Be(n,α)4He reaction rate is not large enough to solve the cosmological lithium problem.",

author = "T. Kawabata and T. Furuno and M. Ichikawa and N. Iwasa and Y. Kanada-En'Yo and A. Koshikawa and S. Kubono and E. Miyawaki and T. Morimoto and M. Murata and T. Nanamura and S. Nishimura and Y. Shikata and Y. Takahashi and T. Takeda and M. Tsumura and K. Watanabe",

note = "Funding Information: This work was supported by JSPS KAKENHI Grant Numbers JP26287058 and JP15H02091. Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.; 11th International Conference on Clustering Aspects of Nuclear Structure and Dynamics, CLUSTER 2016 ; Conference date: 23-05-2016 Through 27-05-2016",

year = "2017",

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doi = "10.1088/1742-6596/863/1/012073",

language = "English",

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TY - JOUR

T1 - Measurement of the cross section for the 4He(α, n)7Be reaction as a possible solution to the cosmological lithium problem

AU - Kawabata, T.

AU - Furuno, T.

AU - Ichikawa, M.

AU - Iwasa, N.

AU - Kanada-En'Yo, Y.

AU - Koshikawa, A.

AU - Kubono, S.

AU - Miyawaki, E.

AU - Morimoto, T.

AU - Murata, M.

AU - Nanamura, T.

AU - Nishimura, S.

AU - Shikata, Y.

AU - Takahashi, Y.

AU - Takeda, T.

AU - Tsumura, M.

AU - Watanabe, K.

N1 - Funding Information: This work was supported by JSPS KAKENHI Grant Numbers JP26287058 and JP15H02091. Publisher Copyright: © Published under licence by IOP Publishing Ltd. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.

PY - 2017/7/4

Y1 - 2017/7/4

N2 - The cross section for the 4He(α,n)7Be reaction was measured at low energies between Eα = 38.50 and 39.64 MeV motivated by the cosmological lithium problem. On the basis of the detailed balance principle, the cross section for the 7Be(n,α)4He reaction was obtained at Ec.m. = 0.20-0.81 MeV close to the Big Bang nucleosynthesis (BBN) energy window for the first time. The obtained cross sections are significantly smaller than the theoretical estimation widely used in the BBN calculations. The present results suggest the 7Be(n,α)4He reaction rate is not large enough to solve the cosmological lithium problem.

AB - The cross section for the 4He(α,n)7Be reaction was measured at low energies between Eα = 38.50 and 39.64 MeV motivated by the cosmological lithium problem. On the basis of the detailed balance principle, the cross section for the 7Be(n,α)4He reaction was obtained at Ec.m. = 0.20-0.81 MeV close to the Big Bang nucleosynthesis (BBN) energy window for the first time. The obtained cross sections are significantly smaller than the theoretical estimation widely used in the BBN calculations. The present results suggest the 7Be(n,α)4He reaction rate is not large enough to solve the cosmological lithium problem.

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JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

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Measurement of the cross section for the ⁴He(α, n)⁷Be reaction as a possible solution to the cosmological lithium problem

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