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Divergence Errors in Raman Depolarization Measurements of Liquids in Capillary Cells

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Abstract:

The source of errors in depolarization measurements using laser excitation and their dependence on monochromator, image magnification, and cell geometry is considered. Two common ways of measuring these ratios are considered, and the extent of the expected divergence errors in capillary cells is calculated for the 90° scattering geometry. It is shown that the ratio ρ n determined by rotating the laser polarization from perpendicular to parallel to the scattering direction is subject to errors which limit its usefulness for highly polarized lines but is acceptable for depolarized lines. Use of an analyzer gives depolarization ratios ρ3 with the highest accuracy.

Keywords: Capillary; Depolarization; Raman

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370270774371750

Affiliations: U. S. Department of Agriculture, Western Utilization Research and Development Division, Albany, California 94710

Publication date: March 1, 1970

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