Inelastic-scattering cross sections forLi+on He: The adiabatic molecular model

In this paper are reported $\mathrm{ab}$ initio computed cross sections for the two lowest charge-transfer channels and the lowest excitation channel for the system ${\mathrm{Li}}^{+}$ scattered from He. The computations are carried out in completely $\mathrm{ab}$ initio fashion in the adiabatic molecular basis. The molecular potential curves and wave functions were computed by use of standard variational procedures. The coupling matrix elements between the molecular states are used in a classical trajectory formulation of the nuclear motion problem to obtain cross sections for the inelastic processes. The differential cross sections agree well with the experimental results of Lorents and Conklin and of Francois, Dhuicq, and Barat. The role of radial coupling in determining the charge-exchange cross sections is stressed.