Vol. 17, issue 10, article # 10

Ponomarev Yu.N., Kapitanov V.A., Karapuzikov A.I., Sherstov I.V. Measurements of molecular absorption line broadening and shift induced by collisions with selectively excited buffer gas molecules. 1. Experimental setup. // Atmospheric and oceanic optics. 2004. V. 17. No. 10. P. 763-766.
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We propose a photoacoustic detector with a differential Helmholtz resonant photoacoustic cell for use in studies of the broadening and shifts of the molecular rotational-vibrational absorption lines due to collisions with selectively excited molecules of a buffer gases. The design and specifications of the photoacoustic laser spectrometer including the laser source for exciting buffer gas molecules at a fixed frequency, tunable narrow-band diode laser for recording absorption line shape and characteristics, as well as the measurement technique are described.