Update README.md

Igor_procedure/intensity_calibration/Model_rotationalRaman_spectra/README.md

@@ -33,7 +33,7 @@ Available  Functions
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-`spectra_H2(T, J_{Stokes}, J_{anti-Stokes})`, and  similar for HD and D<sub>2</sub> : for computing spectra. Here,  temperature T  is in  Kelvin. `J_{Stokes}` and `J_{anti-Stokes})` represents  the maximum rotational J whose intensity is  to be  computed. Intensities are  computed for `J=J_{anti-Stokes},.., J_{Stokes}`. Computed  intensities are relative normalized intensities.
+`spectra_H2(T, J_{Stokes}, J_{anti-Stokes})`, and  similar for HD and D<sub>2</sub> : For computing spectra (normalized relative Raman  intensities for  pure rotation in the three gases). Here,  temperature T  is in  Kelvin. `J_{Stokes}` and `J_{anti-Stokes})` represents  the maximum rotational J whose intensity is  to be  computed. Intensities are  computed for `J=J_{anti-Stokes},.., J_{Stokes}`. Computed  intensities are relative normalized intensities.
 
 Functions can be used directly for computing the sum of states for the three gases for given temperature (for example,  `sumofstate_D2(298)`). When computing spectra the sum of states  are computed within the function (for example, `spectra_H2(298, 6, 6)`) for obtaining the Boltzmann  populations.