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The proposal of a simple method for pulsed photoacoustic system calibration is presented. Analysis of the photoacoustic signal shape is performed with different types of absorbing molecules (SF6 and C2H4) and the same buffer gas (Ar). Different total pressures (ptotal) of such gas mixtures and different laser fluences are used to obtain experimental results and compare them with theory. Results from such a comparison are used directly for the calculation of a calibration curve. A single experimental point calibration procedure for the case of highly vibrationally excited absorbing SF6 molecules is confirmed.

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A pulsed laser photoacoustic technique is described. It is optimized for the simultaneous investigations of multiphoton absorption processes as well as rotational relaxation and vibration relaxation studies. The experimental procedure is presented, concerning the calibration of the photoacoustic detectorlcell set-up, applying the transmission spectroscopy technique. The obtained relationships, which can b e alternatively used for the sensitivity cuNe S(p, y. T) of the apparatus, are analysed. A previously proposed model is confirmed.

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