Multiple ionization of He and Ne by 10 keV electrons as a function of the energy loss

Wiel, M.J. van der; Wiebes, G.

doi:10.1016/0031-8914(71)90187-x

Cited by 52 publications

(1 citation statement)

References 21 publications

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“…It can trace its history to van der Wiel’s works in the 1970’s232425, while the full establishment of this method should be attributed to Brion and his coworkers1426. In the dipole (e, e) method, the high energy electron impact (~several keV) is used and operated at q 2 ≈ 0 (i.e., at a small scattering angle) to simulate the photoabsorption process.…”

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confidence: 99%

The realization of the dipole (γ, γ) method and its application to determine the absolute optical oscillator strengths of helium

Liu

et al. 2015

Sci Rep

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The dipole (γ, γ) method, which is the inelastic x-ray scattering operated at a negligibly small momentum transfer, is proposed and realized to determine the absolute optical oscillator strengths of the vanlence-shell excitations of atoms and molecules. Compared with the conventionally used photoabsorption method, this new method is free from the line saturation effect, which can seriously limit the accuracies of the measured photoabsorption cross sections for discrete transitions with narrow natural linewidths. Furthermore, the Bethe-Born conversion factor of the dipole (γ, γ) method varies much more slowly with the excitation energy than does that of the dipole (e, e) method. Absolute optical oscillator strengths for the excitations of 1s2 → 1 snp(n = 3 − 7) of atomic helium have been determined using the high-resolution dipole (γ, γ) method, and the excellent agreement of the present measurements with both those measured by the dipole (e, e) method and the previous theoretical calculations indicates that the dipole (γ, γ) method is a powerful tool to measure the absolute optical oscillator strengths of the valence-shell excitations of atoms and molecules.

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confidence: 99%