The (³He, α) Reaction on ⁷Li from 5.0 to 8.0 MeV

Abstract

Angular distributions were measured for α₀, α₁ and α₂ groups from the ⁷Li(³He, α)⁶Li reaction at the bombarding energies of 6.0 and 7.5 MeV. Pronounced backward peakings were observed for the α₀ and α₂ groups.
The excitation curves were also measured over the range from 5.0 to 8.0 MeV at the laboratory angles of 20° and 160°. These curves show no resonant behaviour in the whole studied bombarding energy range.
A dominant backward maximum and a forward peak were well described by the plane wave Born approximations with and without exchange, respectively.
The triton plus ³He cluster structure for the ground and second excited states in ⁶Li is discussed. The neutron reduced widths Θ_n² were deduced.