Pulse photoacoustic technique to study of vibrational relaxation in gases

Venedict A. Kapitanov; Boris A. Tikhomirov

doi:10.1117/12.166270

26 January 1994 Pulse photoacoustic technique to study of vibrational relaxation in gases

Venedict A. Kapitanov, Boris A. Tikhomirov

Proceedings Volume 2205, 11th Symposium and School on High-Resolution Molecular Spectroscopy; (1994) https://doi.org/10.1117/12.166270
Event: High Resolution Molecular Spectroscopy: 11th Symposium and School, 1993, Moscow, Russian Federation

Abstract

Characteristic properties of forming of the photoacoustic detector signal at excitation of absorbing gas molecules by a short laser pulse ((tau) << (tau) _vt) allowing for the natural oscillations of microphone membrane are considered. The technique for (tau) _vt measurement is proposed on the strength that the signal form is determined by the oscillation mentioned above under low pressure (P <EQ 10 torr). the results of measurement of (tau) _vt of the vibrational state (nu) ₁ + 3 (nu) ₃ in H₂O for the collisions H₂O- H₂O and H₂O-air are presented.

Citation Download Citation

Venedict A. Kapitanov and Boris A. Tikhomirov "Pulse photoacoustic technique to study of vibrational relaxation in gases", Proc. SPIE 2205, 11th Symposium and School on High-Resolution Molecular Spectroscopy, (26 January 1994); https://doi.org/10.1117/12.166270

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