Atomic Carbon

Collisional rate coefficients are taken from the literature and include collisions with: H (Launay and Roueff 1977), e (Johnson et al. 1987), H+ (Roueff & Le Bourlot 1990), He (Stämmler & Flower 1991), and H2 (Schröder et al. 1991).
More recent calculations for C-H collisions by Abrahamsson et al (2007) exist, but the difference with the Launay & Roueff rates is small.

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