Abstract
The excitation function for the /sup 12/C(/sup 3/He, /sup 7/Be) reaction has been measured up to incident energies of 31 MeV, and the /sup 7/Be recoil properties determined in a series of catcher foil experiments at 30 MeV. Based on the different recoil properties of /sup 7/Be formed by each of four different mechanisms, the contribution of each has been estimated. At 30 MeV the predominant mode of /sup 7/Be formation is through sequential decay of the compound nucleus /sup 15/O*..-->../sup 11/C*+..cap alpha../sub 1/ ..-->../sup 7/Be+..cap alpha../sub 2/+..cap alpha../sub 1/ (approx. =39 mb). This is followed in importance by the direct n pickup reaction to certain excited states in /sup 11/C followed by ..cap alpha..-particle emission /sup 11/C*..-->../sup 7/Be+..cap alpha... The direct ..cap alpha..-particle pickup reaction and compound nucleus evaporation of /sup 7/Be have smaller cross sections (approx. =1 mb and <1 mb, respectively). (AIP)
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