CHARGE-TRANSFER CROSS SECTION IN THE Li-Li+ SYSTEM

Abstract

This work deals theoretically with the charge exchange cross section computed for the system Li-Li+ assuming a very low electric field. The calculations are performed quantum mechanically within the Chapman-Enskog model 1. The calculation starts by constructing the ion-atom potential and, with this system,

the collisional dynamics are determined by the molecular Σg+ and Σ +

states

2 . The gerade and ungerade

potential-energy curves are shown in Fig. 1. The potentials are further used to solve the radial wave equation and therefore to determine the phase shifts. These phase shifts have been used to compute the elastic and charge-transfer cross sections. For illustration, the charge-transfer cross section for the scattering at low energies in the Σg+ and Σu+ states are presented in fig. 2.