Eur. Phys. J. D 37, 361-369 (2006)
https://doi.org/10.1140/epjd/e2005-00305-4

Modified Kolbensvedt model for the electron impact K-shell ionization cross-sections of atoms and ions

¹ Department of Physics, University of Rajshahi, Rajshahi, Bangladesh
² Department of Physics, Department of Physics, Illinois State University, Normal, IL, 61790, USA
³ Department of Physics, Southern Illinois University, Carbondale, IL, 62901, USA
⁴ Department of Physics, Washington University, St. Louis, Mo, 63130, USA

Corresponding author: ^a mauddin@ru.ac.bd

Received: 15 July 2005
Revised: 27 September 2005
Published online: 16 November 2005

Abstract

A modification of the Kolbensvedt model, MKLV, in terms of ionic, correlation (between the incident and target electrons) and relativistic corrections, is proposed to calculate the K-shell electron impact ionization cross-sections of neutral and ionic targets. The modified model, with a single set of parameters, is found to reproduce satisfactorily the experimental data for the neutral H, Al, Ar, Mn, Ge, Mo, Ag, Sn, Au, Bi and U and ionic Li⁺, B⁴⁺ and O⁷⁺ targets better than the existing empirical models from threshold energies to as high as 10⁴ MeV. For the Ag target, the calculations from MKLV follow closely the results of Scofield, and for Au, those of Scofield, and Ndefru and Malik, both done in the relativistic Born approximation with the Møller interaction, at energies higher than the peak region.