A study of the reaction10B(3He, )9B

Angular distributions and excitation functions for the 10 B( 3 He, α 0 ) 9 B and 10 B( 3 He, α 1 ) 9 B* (2.34 MeV) reactions have been measured for 3 He bombarding energies between 2 0 and 10.0 MeV. Differential cross sections have been determined. The angular distributions vary smoothly with energy and show a tendency for both forward and backward peaking. The α 0 angular distributions and the excitation function measured at 150° (lab.) indicate a strong resonance, with Γ similar 1 MeV, at 5.8 MeV bombarding energy, corresponding to an excitation of 26.1 MeV in the 13 N system; but the α 1 data do not show a similar resonance. The occurrence of minor structure in the excitation functions with period of approximately 2 MeV may be evidence for compound nucleus fluctuations. The results suggest that the reaction proceeds mainly by direct processes with a competing resonance process at 5 8 MeV.