Elsevier

Nuclear Physics A

Volume 172, Issue 3, 13 September 1971, Pages 555-568
Nuclear Physics A

States in 8Be studied through the reaction 11B(p, α)8Be with 40 MeV protons

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Abstract

Spectroscopy of the α- and τ-particles from 40 MeV proton bombardment of 11B reveals transitions to 8Be states up to 19 MeV. The ratio of excitation of the 16.6 MeV state to the 16.9 MeV state is 2.3 ± 0.4. The 8Be(4+) state is found at 12.5 MeV with a width of 4.0 ± 0.5 MeV.

States in 9Be excited most strongly are the g.s. and 2.43 MeV level; a state at 3.1 MeV is excited with about 1 % of the strength of the g.s. transition.

Angular distributions show forward-peaking for all states.

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    ††

    Research sponsored by the US Atomic Energy Commission under contract with Union Carbide Corporation.

    †††

    Short communication International Conference on Clustering Phenomena in Nuclei, Bochum 1969, Paper MBR.

    Permanent address: Institut für Experimentalphysik an der Ruhr-Universität Bochum, Bochum, Fed. Rep. Germany.

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