B. G. Ageev, O. Yu. Nikiforova, Yu. N. Ponomarev, “Determination of the relaxation time of the 103 H<sub>2</sub>O vibration with an optoacoustic spectrometer and a ruby laser”, Kvantovaya Elektronika, 1983, Volume 10, Number 3,Pages <nobr>608

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Brief Communications

Determination of the relaxation time of the 103 H₂O vibration with an optoacoustic spectrometer and a ruby laser

B. G. Ageev, O. Yu. Nikiforova, Yu. N. Ponomarev

Abstract: A method was developed for the determination of the vibrational-translational (VT) relaxation time of gases, based on the dependence of the sensitivity of an optoacoustic detector on the pressure of the investigated gas in a cell under pulse excitation conditions. An optoacoustic spectrometer and a pulsed ruby laser were used to determine the relaxation time of the 103 vibration in H₂O vapor. The value obtained, τ_VT(103) = (2.1±0.4)×10^–7 sec·atm, was in qualitative agreement with the results of an experimental determination of the VT relaxation time of the lower H₂O vibration modes (010, 100, 001, 020).

UDC: 539.194:539.196.3

PACS: 33.20.Ea, 42.80.-f, 35.80.+s

Received: 19.02.1982