An (e, 2e+ ion) study of electron-impact ionization and fragmentation of tetrafluoromethane at low energies Khokon Hossen, Xueguang Ren, Enliang Wang, S.V.K. Kumar and Alexander Dorn Eur. Phys. J. D, 72 3 (2018) 43 Published online: 08 March 2018 DOI: 10.1140/epjd/e2017-80665-8