9Be(α, p)12B reaction and primordial nucleosynthesis

R. N. Boyd, S. Kubono, N. Ikeda, M. Y. Tanaka, T. Nomura, Y. Fuchi, H. Kawashima, M. Ohura, H. Orihara, S. Yun, H. Tokyokawa, M. Yosoi, H. Ohnuma

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Abstract

The high-lying levels of 12B have been studied via the 9Be(α, p)12B reaction using 65 MeV α-particles. The reaction protons were analyzed with a quadrupole-dipole-dipole spectrograph, yielding a resolution of about 40 keV. Angular distributions were measured for 20 states ranging in excitation energy from 7.55 to 13.31 MeV. Results of DWBA calculations were compared to the angular distributions to attempt to set limits on the angular momentum transfers. The states seen at excitation energies of 10.57 and 13.31 MeV have potential significance to models of primordial nucleosynthesis via their possible importance to the 8Li(α, n)11B and 9Be(t, p)11B reactions respectively. A new reaction rate for the latter reaction was obtained.

Original languageEnglish
Pages (from-to)97-107
Number of pages11
JournalNuclear Physics, Section A
Volume542
Issue number1
DOIs
Publication statusPublished - Jun 1 1992

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nuclear fusion
angular distribution
dipoles
excitation
spectrographs
momentum transfer
reaction kinetics
angular momentum
quadrupoles
protons
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Boyd, R. N., Kubono, S., Ikeda, N., Tanaka, M. Y., Nomura, T., Fuchi, Y., ... Ohnuma, H. (1992). 9Be(α, p)12B reaction and primordial nucleosynthesis. Nuclear Physics, Section A, 542(1), 97-107. https://doi.org/10.1016/0375-9474(92)90399-5

9Be(α, p)12B reaction and primordial nucleosynthesis. / Boyd, R. N.; Kubono, S.; Ikeda, N.; Tanaka, M. Y.; Nomura, T.; Fuchi, Y.; Kawashima, H.; Ohura, M.; Orihara, H.; Yun, S.; Tokyokawa, H.; Yosoi, M.; Ohnuma, H.

In: Nuclear Physics, Section A, Vol. 542, No. 1, 01.06.1992, p. 97-107.

Research output: Contribution to journalArticle

Boyd, RN, Kubono, S, Ikeda, N, Tanaka, MY, Nomura, T, Fuchi, Y, Kawashima, H, Ohura, M, Orihara, H, Yun, S, Tokyokawa, H, Yosoi, M & Ohnuma, H 1992, '9Be(α, p)12B reaction and primordial nucleosynthesis', Nuclear Physics, Section A, vol. 542, no. 1, pp. 97-107. https://doi.org/10.1016/0375-9474(92)90399-5
Boyd, R. N. ; Kubono, S. ; Ikeda, N. ; Tanaka, M. Y. ; Nomura, T. ; Fuchi, Y. ; Kawashima, H. ; Ohura, M. ; Orihara, H. ; Yun, S. ; Tokyokawa, H. ; Yosoi, M. ; Ohnuma, H. / 9Be(α, p)12B reaction and primordial nucleosynthesis. In: Nuclear Physics, Section A. 1992 ; Vol. 542, No. 1. pp. 97-107.
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