Excitation of Helium-Like Ions by Electron Impact in the First-Order Exchange Coulomb Approximation

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概要

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• Usefulness of the first-order exchange Coulo?nb approximation has beenexamined by applying it to the electron impact exccitation processes of helium-like ions. Collision strengths for the excitation from the groutad state to the n=2states (2'S, 2'S, 2'P and 2'P) for Li", C", O" and Si"" have been cat-culated at energies up to five times threshold energies. It is found that the presentapproximation improves the Coulomb-Born-Oppenheitrxer approximationremarkably and gives results comparable with the five-state close-couplingcalculation of Wyngaarden et al. (1979). It is also found that the short'rangedistortion effect is largely taken care of in the present first-order approximation.

• 社団法人日本物理学会の論文
• 1983-05-15

著者

• Nakazaki Shinobu

  Department Of Applied Physics Faculty Of Engineering Miyazaki University

• Nakazaki Shimobu

  Department Of Applied Physics Fdculty Of Engineering Miyazaki University

関連論文

• Energy Distribution of Secondary Electrons in Electron-Impact Ionization of Hydrogen-Like Ions
• Electron Impact Excitation to the 3 ^1D State of Magnesium from the Ground State (Atomic and Molecular Physics)
• Integral and Differential Cross Sections for the Electron-Impact Excitation of Ar^ Ions
• Excitation of Beryllium-Like Ions by Electron Impact
• Elastic Scattering of Electrons from Na-like Ions (Atomic and Molecular Physics)
• Electron-Impact Excitation Cross-Sections for Helium-like Ions: C V, N VI, O VII and Ne IX
• Evaluation of the Radial Integrals in the Coulomb-Born Approximation
• Excitation of Helium-Like Ions by Electron Impact in the First-Order Exchange Coulomb Approximation

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