3-BODY COULOMB EFFECTS IN THE COULOMB BREAKUP OF LIGHT-NUCLEI INTO 2 FRAGMENTS IN THE FIELD OF A HEAVY MULTIPLY-CHARGED ION

The triple-differential cross section for the quasielastic Coulomb bre akup of a light nucleus n into two fragments b and c in the field of a heavy multiply charged ion A is calculated in the distorted-wave appr oximation. In this calculation, three-body Coulomb effects in the fina l state are taken correctly into account at ultralow energies E-bc Of the relative motion of fragments b and c. The proposed method is used to compute the triple-differential cross section for the reaction Pb-2 08(Li-6, alpha d)Pb-208 at the projectile (lithium-nucleus) energy of E-Li = 156 MeV and the scattering angle of theta = theta(alpha) = thet a(d) = 3 degrees. From an analysis of the triple-differential cross se ction for the Coulomb-breakup reaction Pb-208(Li-6, alpha d)Pb-208, th e astrophysical S factor far the transition d(alpha, gamma)Li-6 at zer o energy E-alpha d is found to be 1.2 nb MeV.