Photoacoustic and Photothermal Phenomena

Eds. P. Hess and J. Pelzl, Springer Series in Optical Sciences, v. 58, pp. 316-320, Springer-Verlag, Berlin, 1988.

Influence of Flowing Gases on the Amplitude of Gas-Microphone-Detected Photoacoustic Signals from Porous and Non-Porous Solids

P. Ganguly and Thayumanasamy Somasundaram

Solid State & Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, INDIA

The influence of the flowing gases on the amplitude of gas-microphone detected photoacoutic signal from solids in an open photoacoustic cell is of interest not only because of its importance in the in situ study of catalysts during reaction conditions, but also because it serves as a test for the theory for the photoacoustic effect. Such experiments are different from those reported earlier where the signal is generated by the gas molecules themselves.