Intensity Measurements in the Raman Spectrum of Carbon Dioxide

A simple photographic method of measuring intensities in the Raman effect was devised. The ratio of the intensities of the strong Raman doublet of CO₂ was found to be 0.572 instead of 0.667 as roughly estimated by Dickinson, Dillon and Rasetti. This value (0.572) although in apparent disagreement with the calculations of Dennison and Adel is in fair agreement with Placzek's recent work. An exposure of 24 days brought out three lines in addition to the four commonly observed. They may be identified with three of the lines predicted by Dennison and Adel.