Analysis of the Raman shift in the low frequency analysis means a relatively low frequency range of the spectrum. In most of standard Raman Spectrometers, allowing the user to analyze the spectral range of 100-200 cm-1. As a Raman spectrometer allow the researcher to observe the details 30-50 cm-1 (standard monochromatic spectrometer) range, even as small as 4-5 cm-1 (triple monochromatic spectrometer) of the range, we call it low frequency analysis.
For most conventional analysis, we use general Raman Spectrometer (spectrum above 100 cm-1), which is sufficient to recognize or identify the sample. However, in some materials, the characteristics of the material is needed to be analyzed by the spectrum less than 100 cm-1, in order to distinguish the different raw materials. In certain other cases, the low frequency analysis is necessarily, for example:
Ultra Low Frequency Raman Spectrum
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