Abstract

Magnitude and phase photoacoustic spectra of a powdered sample made of chrysotile asbestos have been recorded with a low resolution grating spectrometer at ~16 Hz. A good reproduction of the true absorption spectra is obtained from the recording of the phase variation. The optical, thermal, and acoustical effects occurring within this heterogeneous sample are discussed, and a qualitative explanation of the observations is given.

© 1982 Optical Society of America

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