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A general method for Doppler determination of cylindrically symmetric velocity distributions: An application of Fourier transform Doppler spectroscopy
- Source :
- The Journal of Chemical Physics. 93:6554-6559
- Publication Year :
- 1990
- Publisher :
- AIP Publishing, 1990.
-
Abstract
- A general method is developed for determination of cylindrically symmetric velocity distributions from Doppler profile measurements. This method applies Kinsey’s Fourier transform Doppler spectroscopy [J. L. Kinsey, J. Chem. Phys. 66, 2560 (1977)] to distributions arising from photodissociation and uses an orthogonal polynomial expansion to perform the integral transforms analytically. This method is shown to offer an improvement in stability over direct numerical solution of the integral equation and to have applicability to distributions which are not ‘‘separable,’’ that is, which cannot be separated into a product of speed‐ and angle‐dependent factors. The method is applied to experimental measurements of the collisional relaxation of a fast anisotropic distribution of I[2P1/2] atoms in a thermal bath (preceding paper). It is shown that the nascent distribution is separable, but the distribution does not remain separable throughout the relaxation process.
- Subjects :
- Doppler spectroscopy
Chemistry
business.industry
General Physics and Astronomy
Integral transform
Integral equation
Stability (probability)
Computational physics
symbols.namesake
Distribution (mathematics)
Optics
Fourier transform
symbols
Relaxation (physics)
Physical and Theoretical Chemistry
business
Doppler effect
Subjects
Details
- ISSN :
- 10897690 and 00219606
- Volume :
- 93
- Database :
- OpenAIRE
- Journal :
- The Journal of Chemical Physics
- Accession number :
- edsair.doi...........af21e5b538083e226bec0501f05f957e
- Full Text :
- https://doi.org/10.1063/1.458971