Conclusion
The study of the optical properties of vibrationally excited gas is part of the general problem of studying the physicochemical properties of a nonequilibrium gas. A nonequilibrium gas is a new state of a substance with extraordinary properties. Since stationary nonequilibrium is maintained by external pumping, then by changing the external conditions the properties of a nonequilibrium gas can be altered within quite broad limits. The presence of an excess reserve of internal (vibrational) energy transforms the medium into a nonlinear one. The characteristics of the medium start to depend on factors disturbing the nonequilibrium. On the other hand the disturbing factors themselves, say, the optical or gasdynamic disturbance, the charged particle fluxes, etc., will depend in turn on the nonequilibrium that they produce. Such self-consistency makes solution of the problem difficult but then it results in new phenomena such as self-focusing.
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Abbreviations
- NAv :
-
Avogadro number
- ρ:
-
density
- n:
-
refractive index
- N:
-
density of the number of molecules
- α:
-
their mean polarizability
- Qj :
-
set of normal coordinates
- W0 :
-
energy of a molecule without a field
- gv j :
-
statistical weight of the vibrational statev j with normal coordinate Qj
- mj :
-
reduced mass
- ωj :
-
frequency of the j-th mode
- xe :
-
anharmony constant of the molecule
- λ:
-
probing radiation wavelength
- δ:
-
shift of the interference fringe
- d:
-
length of the interferometer “arm”
- r0 :
-
initial light beam radius
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 56, No. 5, pp. 824–838, May, 1989.
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Osipov, A.I., Filippov, A.A. Optical properties of a nonequilibrium vibrationally excited gas. Journal of Engineering Physics 56, 590–602 (1989). https://doi.org/10.1007/BF01297613
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DOI: https://doi.org/10.1007/BF01297613