A COMPARISON OF STATE-TO-STATE ROTATIONAL TOTAL CROSS-SECTIONS USING 2-DIMENSIONAL AND 3-DIMENSIONAL CLOSE-COUPLED APPROACHES

State-to-state rotational total cross sections have been calculated fo r the Xe-CO2 scattering at 0.01 and 0.03 eV collision energies using t he two- and three-dimensional close coupling methods. As will be point ed out, these results are in fair agreement only after the last multip le collision maximum in the two-dimensional dynamics. The full two-dim ensional quantum total cross sections, at 0.2 eV of the collision ener gy, are also presented for the collision process under study.