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Proceedings Paper

Laser photoacoustic spectroscopy: a powerful tool for trace gas measurements
Author(s): D. C. Dumitras
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Paper Abstract

Laser photoacoustic spectroscopy (LPAS) is one of the most sensitive calorimetric techniques that consists in energy conversion from modulated excitation radiation (laser) to sound energy and it is due to nonradiative transitions that convert a part of absorbed energy into thermal energy. The temperature variations then determine the formation of acoustic waves. At the wavelengths of the CO2 laser (9-11 μm), more than two hundred of molecular gases can be detected with a system based on photoacoustic (PA) spectroscopy, at concentrations as low as ppb or even ppt.

Paper Details

Date Published: 1 September 1996
PDF: 2 pages
Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 277891 (1 September 1996); doi: 10.1117/12.2316014
Show Author Affiliations
D. C. Dumitras, Institute of Physics and Technology of Radiation Devices (Romania)


Published in SPIE Proceedings Vol. 2778:
17th Congress of the International Commission for Optics: Optics for Science and New Technology
Joon-Sung Chang; Jai-Hyung Lee; ChangHee Nam, Editor(s)

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