Abstract
IN a letter to NATURE of Oct. 27, 1928, on the influence of temperature on the modified lines in scattered light, Dr. Krishnan reported that with rising temperature the intensity of the anti-Stokes lines was increased relative to that of the Stokes lines, using carbon tetrachloride as the scattering substance. I have examined also the influence of temperature on certain organic liquids and have observed an effect of another kind. When the temperature of the scattering substance is increased, certain Raman lines become very diffuse. Fig. 1 shows the Raman spectrum scattered by toluene at 10° C. and at 100° C., the light source being a mercury lamp. Nearly all the lines which appear in this figure are modified from the strong Hg line, 4359, except 4617.89 and 4589.2, which are modified from the Hg line 4047. Among them it can be seen that the doublet lines λ = 4686.82 and 4683.33 (Δυ from 4359 being 1607.2 cm.-1 and 1591.7 cm.-1 respectively) become very diffuse at the high temperature. Fig. 2 shows the photomicrometric curve of that spectrum, in which noticeably affected lines are indicated by arrows. The same effect is observed in the scattering by other substances for example, benzene and carbon tetrachioride.
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FUJIOKA, Y. Influence of Temperature on Raman Lines. Nature 124, 11 (1929). https://doi.org/10.1038/124011a0
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DOI: https://doi.org/10.1038/124011a0
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