We present ionization cross-sections of collisions between electrons and carbon atoms using the classical trajectory Monte Carlo method. Total are benchmarked against reported experimental data predictions numerically intensive theoretical methods as well pioneering calculations for this collision system. At impact energies greater than about 100 eV, results in very good agreement with generali...

Molecular R-matrix with pseudostate calculations are reported for the electron-impact ionization cross section of the carbon dimer anion. A (1)Sigma_(g)(+) resonance is found near the detachment threshold and two further resonances, of (3)Pi_(g) and (1)Pi_(g) symmetry, are found near 10 eV close to the structures observed experimentally. These unusual shape resonances are a result of the compet...