Nitrogen, absolute differential Raman scattering cross section

The mean value of the absolute differential Raman scattering cross section of the Q-branch of nitrogen was established to be (Schrotter and Klockner 1979)... 

A. Absolute Differential Raman Scattering Cross Section of Nitrogen.212... 

The absolute differential scattering cross section of the standard needs to be determined as precisely as possible. A number of measurements has been performed ovm-the past forty years [260,278-287]. The introduction of lasers in Raman spectroscopy and of computer processing of spectral data has improved highly the accuracy of Raman intensity measurements. As a result, the absolute differential Raman scattering cross section of nitrogen reported frrom different laboratories deviates within a few percent only [260,284,285,287]. 

The absolute differential Raman scattering cross section of the line of the sample can be obtained from the relative value by using the absolute scattering cross section of nitrogen as given in Eq. (8.73). 

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