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. PDF
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Abstract:

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.