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Issue J. Phys. Colloques
Volume 44, Number C6, Octobre 1983
Spectroscopie Photoacoustique et Photothermique / Photoacoustic and Photothermal Spectroscopy
Page(s) C6-239 - C6-242
DOI http://dx.doi.org/10.1051/jphyscol:1983637

Spectroscopie Photoacoustique et Photothermique / Photoacoustic and Photothermal Spectroscopy

J. Phys. Colloques 44 (1983) C6-239-C6-242
DOI: 10.1051/jphyscol:1983637

A NOVEL TECHNIQUE FOR THE ENHANCEMENT OF PHOTOACOUSTIC SIGNAL

T. Somasundaram et P. Ganguly

Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 12, India


Résumé
Le signal photoacoustique se trouve renforcé par l'introduction de liquide volatile dans la cellule. Cette augmentation se remarque pour un coefficient faible d'absorption optique et une plus grande fréquence de coupure et est proportionnelle à la pression de la vapeur du liquide. Le signal PA des liquides se trouve renforcé avec la température qui, à son tour, est proportionelle à la pression de la vapeur pour chaque température.


Abstract
The photoacoustic signal is found to be enhanced several fold by the introduction of a volatile liquid into the cell. The enhancement is more for lower optical absorption coefficient and higher chopping frequency and is proportional to the vapour pressure of the liquid. The PA signal from liquids increases with temperature being proportional to the vapour pressure at each temperature.





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