6533b833fe1ef96bd129ca1a
RESEARCH PRODUCT
SPECTROSCOPY AND NON-EQUILIBRIUM DISTRIBUTION OF VIBRATIONALLY EXCITED METHANE IN A SUPERSONIC JET
Yu. G. SelivanovD. K. BronnikovV. D. RusanovYu.g. FilimonovD.v. KalininJ.c. Hilicosubject
Physicseducation.field_of_studyRadiationPopulationLaserAtomic and Molecular Physics and OpticsMethaneSpectral linelaw.inventionMathematics::Logicchemistry.chemical_compoundchemistrylawExcited stateVibrational energy relaxationSupersonic speedPhysics::Chemical PhysicsAtomic physicseducationSpectroscopySpectroscopydescription
Abstract High-resolution spectra of supersonic jets of vibrationally excited methane have been recorded by diode laser in the 8 μm region. A formalism for the description of energy distribution is proposed. It allows to estimate populations of vibrational polyads. Under these non-equilibrium conditions, translational temperature is also measured from line profiles. For relaxation, it is shown that vibrational relaxation between polyads is negligible whereas strong redistribution of population arises inside each polyad. Spectroscopically, observed lines involving the first four excited polyads allows cross-checked tests for energy level analysis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-12-01 | Journal of Quantitative Spectroscopy and Radiative Transfer |