Elastic and Inelastic Cross Sections for ^12C+CO_2 and ^13C+CO_2 Scattering at Superthermal Energies

We report elastic and inelastic cross-sections for fast superthermal C-12(P-3) and C-13( 3P) atoms scattering on (CO2)-C-12. The cross-sections were computed using quantum-mechanical rotationally close-coupling formalism with the electronic interaction described by a newly constructed potential energy surface correlating to the lowest energy asymptote of the complex. State-to-state rotational cross-sections, differential cross-sections, and derived transport properties of interest for energy relaxation are also reported. The computed elastic differential cross-sections are found to be strongly anisotropic, show significant energy dependence, and differ by up to 2 percent between the two isotopes of carbon.