Angular Distributions of Protons from the Alpha Particle Bombardment of B¹⁰, N¹⁴, O¹⁶ and Ne²⁰

Abstract

Angular distributions of protons from the alpha particle bombardment have been obtained for the following transitions, corresponding to discrete states of the residual nuclei: B¹⁰(α, p)C¹³ ground at bombarding energies 27.5 and 33.1 MeV; N¹⁴(α, p)O¹⁷ ground, first, second, third at bombarding energies 26.8, 28.1 and 33.3 MeV; O¹⁶(α, p)F¹⁹ ground to second (unresolved), third to fifth (unresolved), Sixth at bombarding energies 26.7 and 33.1 MeV; and Ne²⁰(α, p)Na²³ ground and first (unresolved), second to sixth (unresolved) at bombarding energy 26.9 MeV. These angular distributions show the so-called diffraction patterns and some of them are interpreted with the aid of predictions of the direct interaction theory. However, some deviations from the predictions of the direct interaction theory exist and suggest the effect of other nuclear reaction processes.