Magnitude and phase photoacoustic spectra of chrysotile asbestos, a powdered sample.
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.
Bertrand
L
L
Monchalin
J P
JP
Lepoutre
F
F