3-BODY STRUCTURE OF LI-8 AND THE LI-7(N,GAMMA)LI-8 REACTION

A three-body cluster He-4+t+n model is developed for Li-8 using the me thod of hyperspherical harmonics with realistic cluster-cluster intera ctions fitted to experimental data. The model is used to calculate wav e functions, spatial and matter densities of the ground state and the low lying excited state of 8Li, The model reproduces experimentally kn own properties of Li-8. Contrary to two-body models, our prediction fo r the radiative neutron capture on Li-7 at low energies supports a low er cross section value.