6533b86dfe1ef96bd12c9d94
RESEARCH PRODUCT
High-resolution photoacoustic Raman spectroscopy of gases
R. ChauxBruno LavorelM. Rotgersubject
ChemistryResolution (electron density)Analytical chemistryLaserHot bandSpectral linelaw.inventionsymbols.namesakeFull width at half maximumlawsymbolsGeneral Materials ScienceRaman spectroscopySpectroscopyDoppler effectSpectroscopydescription
A high-resolution photoacoustic Raman spectroscopy experiment is described. The resolution achieved by using two single-mode pulsed lasers is about 0.0054 cm −1 (full width at half maximum intensity). The experiment was tested first on the v 1 /2v 2 bands of CO 2 and gave an increase of at least about one order of magnitude in the signal-to-noise ratio with respect to stimulated Raman spectroscopy at low pressure (ca. 10 Torr ≃ 1.3 kPa). The sensitivity is also demonstrated by the study of the weak hot band v 1 +v 2 −v 2 of CO 2 . In both cases, the experimental line shape is well reproduced by taking into account Doppler and collisional effects. A comparison with CARS spectra was also made
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-05-01 | Journal of Raman Spectroscopy |