Electron impact ionization cross section studies of C2Fx (x = 1 − 6) and C3Fx (x = 1 − 8) fluorocarbon speciesDhanoj Gupta, Heechol Choi, Mi-Young Song, Grzegorz P. Karwasz and Jung-Sik YoonEur. Phys. J. D, 71 4 (2017) 88DOI: https://doi.org/10.1140/epjd/e2017-70769-6