NDLI: Generalized oscillator strengths of the valence-shell excitations of argon studied by fast electron impact

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Generalized oscillator strengths of the valence-shell excitations of argon studied by fast electron impact

Content Provider	Scilit
Author	Chen, Tao Liu, Ya-Wei Xu, Yuan-Chen Zhu, Lin-Fan
Copyright Year	2020
Description	Journal: Journal of Physics B: Atomic, Molecular and Optical Physics The generalized oscillator strengths of the valence-shell excitations from the ground state to 3p5(4s, 4s', 4p, 4p', 3d, 3d', 5p, 5p', 5s, 4d) of argon have been determined at an incident electron energy of 1500 eV and an energy resolution about 90 meV. The accuracy of the present generalized oscillator strengths is improved by the adopted relative flow technique. The comprehensive comparison of the present results with the previous experimental and theoretical ones shows that the first Born approximation is satisfied in the lower squared momentum transfer region for the electric dipole excitations, while the deviations from the prediction of the first Born approximation and the inelastic X-ray scattering measurements near the minimum and in the larger K2 region are obvious, which can be attributed to the failure of the first Born approximation in this K2 region. The invalidity of the first Born approximation has also been observed for the electric monopole transitions even at a high impact electron energy of 2500 eV.
Related Links	https://iopscience.iop.org/article/10.1088/1361-6455/ab752a/pdf
ISSN	09534075
e-ISSN	13616455
DOI	10.1088/1361-6455/ab752a
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Issue Number	8
Volume Number	53
Language	English
Publisher	IOP Publishing
Publisher Date	2020-02-11
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics B: Atomic, Molecular and Optical Physics Atomic, Molecular and Chemical Physics Oscillator Strengths
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics

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