HIGHER ORDER PROCESSES IN L-SHELL IONIZATION.

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Abstract

The time-dependent perturbation theory was applied to the description of the L-shell ionization of atoms by heavy-charged particles in the independent-particle model approximation. A second order correction factor to cross sections calculated in a first order theory was derived considering transitions at an average impact parameter and with minimum energy transfer as dominant ionization processes in low-velocity collisions. Numerical calculations were performed for light and heavy ion impact ionization of gold in the energy range 0. 15-2. 0 Mev/u. The results are in satisfactory agreement with the experimental data for the L//3-to-L//2 and L//1-to-L//2 subshell ionization cross section ratios. The model seems to account also for the anomalous behavior of the L//3-subshell alignment observed recently at heavy-ion impact.

Original languageEnglish
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume232
Publication statusPublished - Jul 1983

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Ionization
Heavy Ions
ion impact
Heavy ions
ionization
heavy ions
Impact ionization
light ions
ionization cross sections
Charged particles
Gold
Energy transfer
low speed
charged particles
perturbation theory
energy transfer
alignment
gold
Atoms
collisions

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Instrumentation
  • Surfaces and Interfaces

Cite this

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title = "HIGHER ORDER PROCESSES IN L-SHELL IONIZATION.",
abstract = "The time-dependent perturbation theory was applied to the description of the L-shell ionization of atoms by heavy-charged particles in the independent-particle model approximation. A second order correction factor to cross sections calculated in a first order theory was derived considering transitions at an average impact parameter and with minimum energy transfer as dominant ionization processes in low-velocity collisions. Numerical calculations were performed for light and heavy ion impact ionization of gold in the energy range 0. 15-2. 0 Mev/u. The results are in satisfactory agreement with the experimental data for the L//3-to-L//2 and L//1-to-L//2 subshell ionization cross section ratios. The model seems to account also for the anomalous behavior of the L//3-subshell alignment observed recently at heavy-ion impact.",
author = "L. Sarkadi and T. Mukoyama",
year = "1983",
month = "7",
language = "English",
volume = "232",
journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",
issn = "0168-583X",
publisher = "Elsevier",

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T1 - HIGHER ORDER PROCESSES IN L-SHELL IONIZATION.

AU - Sarkadi, L.

AU - Mukoyama, T.

PY - 1983/7

Y1 - 1983/7

N2 - The time-dependent perturbation theory was applied to the description of the L-shell ionization of atoms by heavy-charged particles in the independent-particle model approximation. A second order correction factor to cross sections calculated in a first order theory was derived considering transitions at an average impact parameter and with minimum energy transfer as dominant ionization processes in low-velocity collisions. Numerical calculations were performed for light and heavy ion impact ionization of gold in the energy range 0. 15-2. 0 Mev/u. The results are in satisfactory agreement with the experimental data for the L//3-to-L//2 and L//1-to-L//2 subshell ionization cross section ratios. The model seems to account also for the anomalous behavior of the L//3-subshell alignment observed recently at heavy-ion impact.

AB - The time-dependent perturbation theory was applied to the description of the L-shell ionization of atoms by heavy-charged particles in the independent-particle model approximation. A second order correction factor to cross sections calculated in a first order theory was derived considering transitions at an average impact parameter and with minimum energy transfer as dominant ionization processes in low-velocity collisions. Numerical calculations were performed for light and heavy ion impact ionization of gold in the energy range 0. 15-2. 0 Mev/u. The results are in satisfactory agreement with the experimental data for the L//3-to-L//2 and L//1-to-L//2 subshell ionization cross section ratios. The model seems to account also for the anomalous behavior of the L//3-subshell alignment observed recently at heavy-ion impact.

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