Abstract
An empirical formula with three free parameters is given for the representation of cross-sections for single ionization of atoms and ions from the ground state by electron-impact. Almost all experimental results can be approximated by this formula within 10% over the whole energy range between threshold and 10 keV; all experimental results can be approximated within experimental error. The formula proposed is not suitable to reproduce the exact contour of fine structures in the ionization cross-section curve.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
This work was performed as part of the joint research program of the Institut für Plasmaphysik, Garching, and EURATOM.
Rights and permissions
About this article
Cite this article
Lotz, W. An empirical formula for the electron-impact ionization cross-section. Z. Physik 206, 205–211 (1967). https://doi.org/10.1007/BF01325928
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01325928