Die Reaktion11B(d, α)9Be im Energiebereich von 0,7 bis 2,2 MeV

Excitation functions were measured from 0.7 to 2.2 MeV for the α₀ -, α₁-, α₂- and α₃-groups at an angle ofθ_L=90°. Two broad maxima were found in all four cases, suggesting the existance of resonances in the¹³C-compound nucleus. A problem, however, arises, as the first maximum appears at a bombarding energy of 1.15 MeV for the α₀- and α₁-groups, whilst it is shifted to 1.35 MeV in the excitation curves for the α₂- and α₃-groups. The second maximum appears at 1.85 MeV in all curves. Angular distributions were measured at 7 energies between 1.0 and 2.2 MeV for the α₀- and α₂-transitions. The coefficients of the first four Legendre polinomials, describing these distributions, are given.