Abstract
We present an improved formula to describe the energy dependence in the low-energy regime of calculated atomic K-shell ionization cross sections using the semiclassical Deutsch-Märk formalism. The modified energy dependence was obtained from a fitting procedure using recent K-shell ionization cross section data for atomic sulfur. A comparison of calculated K-shell ionization cross sections using this modified energy dependence with (1) critically evaluated experimental data for 11 other atoms and (2) cross section shapes derived from other predictive formulae revealed good agreement, not only in the low-energy regime, but also at relativistic impact energies.
Original language | English (US) |
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Pages (from-to) | 47-50 |
Number of pages | 4 |
Journal | International Journal of Mass Spectrometry |
Volume | 177 |
Issue number | 1 |
State | Published - Aug 3 1998 |
Keywords
- Ionization cross sections
- K-shell ionization
- Semiempirical methods
ASJC Scopus subject areas
- Instrumentation
- Condensed Matter Physics
- Spectroscopy
- Physical and Theoretical Chemistry