Critical behavior of electron impact ionization of atoms

Imad Ladadwa, Sabre Kais

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Cross sections of the electron impact ionization for different atoms are calculated numerically in the Born approximation as a function of both the incident electron energy and the nuclear charge Z of the ionized atom. We show that the cross section for ionization tends to a large magnitude as the nuclear charge of the target atom tends to its critical value, where the critical nuclear charge is the minimum charge necessary to bind N electrons. Results show that there is a fundamental difference in the change of the cross section near the critical point depending on whether the transition from bound to a continuum state is first order or continuous. The cross section for ionization and the threshold power law for two and three electrons are discussed.

Original languageEnglish
Pages (from-to)575-581
Number of pages7
JournalInternational Journal of Quantum Chemistry
Volume80
Issue number4-5
Publication statusPublished - 1 Nov 2000
Externally publishedYes

Fingerprint

Impact ionization
electron impact
ionization
Atoms
Electrons
cross sections
Ionization
atoms
N electrons
Born approximation
critical point
electron energy
continuums
thresholds
electrons

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Critical behavior of electron impact ionization of atoms. / Ladadwa, Imad; Kais, Sabre.

In: International Journal of Quantum Chemistry, Vol. 80, No. 4-5, 01.11.2000, p. 575-581.

Research output: Contribution to journalArticle

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