Abstract:
A review is given of investigations based on the recording of spontaneous Raman scattering (SPRS) signals. These include sounding of the atmosphere, identification of fuel combustion products (including exhaust gases from motor vehicles) ejected into the atmosphere, studies of gas mixing processes and of gas compositions, measurements of hot gas and flame temperatures, and detection of harmful impurities in water. The main parameters of the apparatus are discussed. An analysis is made of the use of the SPRS resonance to enhance the sensitivity of the measurements. Methods for discriminating against luminescence and for selecting lines belonging to specific components of a mixture or to a solvent from complex Raman spectra are described. The main principles of three methods of active Raman spectroscopy are described. The practical implementation of these methods is considered and the results of using one of these in remote experiments are also presented.
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