DETERMINATION OF FREQUENCY-SHIFTS BY RAMAN DIFFERENCE SPECTROSCOPY

The characteristics of the Raman difference spectra which result when one Raman signal arising from a particular chemical species is subtracted from a second Raman signal due to the same species in a different system, have been examined for both Lorentzian and Gaussian band profiles. The mathematical relationships between (frequency separation in the difference spectra), d (intensity of difference spectra), (frequency separation between the two Raman spectra), I0 (Raman band height), and (Raman bandwidth) have been derived. The relationship between the ratios d/I 0 and / is most useful for the determination of very accurate values of , the frequency shift. These can often be determined to within 0.01 cm-1. 1980 American Institute of Physics.

DETERMINATION OF FREQUENCY-SHIFTS BY RAMAN DIFFERENCE SPECTROSCOPY Academic Article