Alpha Emitting Reactions on Be9, B10 and B11 Induced by Protons, Deuterons and Alpha-Particles

Abstract

The angular distributions have been obtained for alpha-particles from the reactions Be ⁹ ( p , α) Li ⁶ (ground state), Be ⁹ ( d , α) Li ⁷ (ground, first and second excited states), B ¹⁰ ( p , α) Be ⁷ (ground state), B ¹⁰ ( d , α) Be ⁸ (ground state), B ¹¹ ( p , α) Be ⁸ (ground state) and B ¹¹ ( d , α) Be ⁹ (ground and second excited states), and from the elastic and inelastic (second excited state) scatterings of alpha-particles by Be ⁹ . Besides, the angular distribution of deuterons from the reaction Be ⁹ ( p , d ) Be ⁸ (ground state) was measured. The energies of incident beams were nearly 7 MeV for protons, 14 MeV for deuterons and 28 MeV for alpha-particles. The results, except for B ¹⁰ ( p , α)Be ⁷ and B ¹¹ ( p , α)Be ⁸ , show forward and/or backward rises and may be interpreted by direct interactions. The integrated cross sections of the reactions ( p , α) and ( d , α) on Be ⁹ are larger than those on B ¹⁰ and B ¹¹ .