Semi-empirical expressions for the electron impact ionization cross-sections of CH, CH2, CH5, and CH4 are given with the appropriate values of the parameters. They constitute convenient interpolation formulas in the study of the Jovian ionosphere.
Leer, H. C., Tseng, H. C., & Lin, C. D. (1999). Electron Capture Cross Sections in N^4++H Collisions. Chinese Journal of Physics, 37(4), 380-388. https://www.airitilibrary.com/Article/Detail?DocID=05779073-199908-201211300016-201211300016-380-388