Absolute and scaled electron-impact ionization cross-sections for hydrogen-, helium-, and lithium-like ions

H. Deutsch, K. Becker, T. D. Märk

Research output: Contribution to journalArticle

Abstract

Scaling laws and semiempirical methods can be powerful tools to predict electron-impact ionization cross-section data for modelling purposes and many other practical applications where a quick estimate of a large number of reasonably accurate cross-sections in analytical form is needed. Scaling laws can also be useful for the prediction of cross-section values for targets for which no experimental data or rigorous theoretical calculations are available. This paper describes the development of a new scaling law for electron-impact ionization cross-sections of hydrogen-, helium-, and lithium-like atomic targets based on the semiclassical Deutsch-Märk (DM) formalism. We show that the DM approach provides quantitative justification for a scaling law similar to the widely used Z4 scaling law for hydrogen-like targets (where Z is the nuclear charge) and that a new scaling law for the calculation of absolute ionization cross-sections for other isoelectronic sequences can be derived in the framework of the DM formalism. A detailed comparison of scaled and absolute cross-section estimates based on this scaling law with available experimental data is made.

Original languageEnglish (US)
Pages (from-to)207-217
Number of pages11
JournalInternational Journal of Mass Spectrometry and Ion Processes
Volume151
Issue number2-3
DOIs
StatePublished - Dec 15 1995

Fingerprint

Helium
Impact ionization
Scaling laws
ionization cross sections
Lithium
scaling laws
electron impact
Hydrogen
lithium
helium
Ions
Electrons
hydrogen
ions
cross sections
formalism
isoelectronic sequence
estimates
Ionization
predictions

Keywords

  • Cross-sections
  • Electron-impact ionization
  • Ions

ASJC Scopus subject areas

  • Spectroscopy

Cite this

Absolute and scaled electron-impact ionization cross-sections for hydrogen-, helium-, and lithium-like ions. / Deutsch, H.; Becker, K.; Märk, T. D.

In: International Journal of Mass Spectrometry and Ion Processes, Vol. 151, No. 2-3, 15.12.1995, p. 207-217.

Research output: Contribution to journalArticle

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