Algebraic approximation for a line halfwidth as a function of collision broadening and narrowing parameters

Victor P. Kochanov; Igor V. Ptashnik

doi:10.1117/12.375387

25 January 2000 Algebraic approximation for a line halfwidth as a function of collision broadening and narrowing parameters

Victor P. Kochanov, Igor V. Ptashnik

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Proceedings Volume 4063, 13th Symposium and School on High-Resolution Molecular Spectroscopy; (2000) https://doi.org/10.1117/12.375387
Event: 13th Symposium and School on High-Resolution Molecular Spectroscopy, 1999, Tomsk, Russian Federation

Abstract

An algebraic approximation for a line halfwidth at the half- maximum ((delta) ) was obtained from the calculated values of (delta) , which depends on the collision broadening and narrowing parameters and the Doppler halfwidth. Both the hard and soft collision models describing the effect of velocity-changing collisions were approximated. The mean discrepancy between the approximated and exact values of (delta) does not exceed 0.1 divided by 0.15%. A simple criterion was developed which allows one to judge about the correspondence of the experimental dependence of (delta) on buffer gas pressure to hard or soft collision model.

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Victor P. Kochanov and Igor V. Ptashnik "Algebraic approximation for a line halfwidth as a function of collision broadening and narrowing parameters", Proc. SPIE 4063, 13th Symposium and School on High-Resolution Molecular Spectroscopy, (25 January 2000); https://doi.org/10.1117/12.375387

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KEYWORDS

Data modeling

Remote sensing

Doppler effect

Argon

Autoregressive models

Molecules

Molecular spectroscopy

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