, Y.
(2000),
Extension of the Binary-Encounter-Dipole Model to Relativistic Incident Electrons, Physical Review A (Atomic, Molecular and Optical Physics)
(Accessed December 26, 2024)
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Extension of the Binary-Encounter-Dipole Model to Relativistic Incident Electrons
Published
Author(s)
Abstract
Formulas for the total ionization cross section by electron-impact based on the binary-encounter-dipole (BED) model and its simpler version, binary-encounter-Bethe (BEB) model are extended to relativistic incident electron energies. Total ionization cross sections for the hydrogen and helium atoms from the new relativistic formulas are compared to experimental data. Relativistic effects double the total ionization cross section of H and He at incident electron energy ~ 300 keV and dominate the cross section thereafter. A simple modification of the original BED/BEB formulas is proposed for applications to ion targets and inner-shell electrons of neutral atoms and molecules. The resulting relativistic and nonrelativistic BEB cross sections for the K-shell ionization of the niobium atom agree well with the recent experimental data, while the popular empirical cross section by Casnati et al. is higher than the experiment.34.80.Dp, 34.80.Gs, 34.80.KwCitation
Physical Review A (Atomic, Molecular and Optical Physics)
Volume
62
Issue
No. 5
Pub Type
Journals
Keywords
atomic ion, helium, hydrogen, K-shell ionization, niobium, relativistic ionization cross section
Citation
Issues
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Created November 1, 2000, Updated February 17, 2017