Unified theory of collisional line profiles: study of the D lines of caesium perturbed by xenon: width, shift, asymmetry and satellites

“…Eq. 5predicts an infinite intensity at r values where d(AV)/dr vanishes (satellite bands), a physically meaningless result which can be corrected either by taking into account the collision time [50][51][52] or by a Franck-Condon approach [53,54]. This procedure leads to a realistic satellite shape without affecting its position noticeably.…”

mentioning

confidence: 99%

High density self-broadening of the first xenon and krypton resonance line

Laporte¹,

Damany²

1979

J. Phys. France

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Self-broadening of the 146.96 nm xenon line and 123.58 nm krypton line is studied in the density range 1-100 amagat (2.7 x 1019 — 2.7 × 1021 at. cm-3). The absorption profile is deduced from reflection experiments by a modified Kramers-Krönig analysis. A detailed discussion of the criteria for validity of available theories is given, allowing the determination of the extent to which the cases studied are related to many-body interactions and/or pure resonance forces. The quasistatic theory, in the nearest neighbour approximation, is shown to be valid for interpreting the far wings. Thus it is possible at increasing density, to underline the specific effect of the various kinds of forces : resonance, Van der Waals and repulsive, and to specify the 1u excited state potential which is found weakly attractive for Xe2 and Kr2

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“…They also show small oscillations. Possible reasons for that are the fact that the calculations presented here assume that the perturbers have a single constant velocity and no averaging was done, causing an effect similar to diffraction, as mentioned by Allard (1978) and, mainly, the contribution of the window function in the Fourier transform [as reported by Allard, Sahal-Brechot & Biraud (1974)]. …”

Section: Lyman βmentioning

confidence: 99%

Unified line profiles for hydrogen perturbed by collisions with protons: satellites and asymmetries

Pelisoli

Santos

2015

Monthly Notices of the Royal Astronomical Society

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We present new calculations of unified line profiles for hydrogen perturbed by collisions with protons. We report on new calculations of the potential energies and dipole moments which allow the evaluation of profiles for the lines of the Lyman series up to Lyman δ and the Balmer series up to Balmer 10. Unified calculations only existed for the lines Lyman α to Lyman γ and Balmer α including the H + 2 quasimolecule. These data are available as online material accompanying this paper and should be included in atmosphere models, in place of the Stark effect of protons, since the quasi-molecular contributions cause not only satellites, but large asymmetries that are unaccounted for in models that assume Stark broadening of electrons and protons are equal.

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Unified theory of collisional line profiles: study of the D lines of caesium perturbed by xenon: width, shift, asymmetry and satellites

Cited by 22 publications

References 15 publications

Effect of the velocities of the perturbers on alkali-rare gas line profiles

Effect of the velocities of the perturbers on alkali-rare gas line profiles

High density self-broadening of the first xenon and krypton resonance line

Unified line profiles for hydrogen perturbed by collisions with protons: satellites and asymmetries

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