Empirical model for electron impact ionization cross sections of neutral atoms M. R. Talukder, S. Bose, M. A.R. Patoary, A. K.F. Haque, M. A. Uddin, A. K. Basak and M. Kando Eur. Phys. J. D, 46 2 (2008) 281-287 Published online: 23 November 2007 DOI: 10.1140/epjd/e2007-00318-y