Elsevier

Nuclear Physics A

Volume 542, Issue 1, 1 June 1992, Pages 97-107
Nuclear Physics A

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

https://doi.org/10.1016/0375-9474(92)90399-5Get rights and content

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.

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The work was partially supported by the National Science Foundation through grant PHY89-20606.

1

Permanent address: Dept. of Physics, Dept. of Astronomy, The Ohio State University, Columbus, OH 43210, USA.

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