Bettens, RyanCollins, Michael2015-12-130021-9606http://hdl.handle.net/1885/72297A method for calculating multiple long-range interaction potentials between C (3P) and a closed-shell neutral molecule was developed and used for the determination of capture rate coefficients for collisions of C (3Pj) and Ge(1S0 with unsaturated hydrocarbons. Nine adiabatic interaction potentials were determined simultaneously at fixed orientations between the carbon atom and the molecule by diagonalizing a Hamiltonian that considers all nine C (3P) closed-shell molecule states.Keywords: Atoms; Calculations; Eigenvalues and eigenfunctions; Electron energy levels; Electrostatics; Hamiltonians; Hydrocarbons; Mathematical operators; Matrix algebra; Molecules; Perturbation techniques; Potential energy; Ab initio calculation; Capture rate coef200210.1063/1.14243142015-12-11