Energy levels, transition frequencies and Einstein A coefficients for the CH spin-rotation spectrum without hyperfine structure are based on CDMS, version 3 of June 2015. Collision rates are taken from Marinakis et al (2015) and were calculated for temperatures in the range from 10 to 300 K including energy levels up to 1000 cm-1 above the ground state. The rates were scaled from He to H2, but not extrapolated.

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