THE ANGULAR DISTRIBUTION OF THE Li7(t, α)He6 REACTIONS AT 240 KEV. TRITON ENERGY

Abstract

The angular distributions of the Li7(t, α)He6 reactions have been measured between 41° and 139° to the beam in the laboratory system. The distribution of the 5.95 Mev. α-particles associated with the formation of ground state He6 is of the form [Formula: see text] in the center of mass system. The 4.95 Mev. α-particles associated with the formation of the first excited state of He6 are distributed isotropically within ±8%. These results are consistent with the expectation that the ground state of He6 has spin 0 and the first excited state spin 2 and suggest that the compound state, Be10, has J = 2.