Molecular Interaction and Linewidth of the Asymmetric Molecule SO2. II. SO2–CO2 Collisions

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Abstract
The linewidth of the 91,9→82,6 transition of SO2, broadened by carbon dioxide, has been measured. The measured linewidth for SO2–CO2 collision is 7.22 Mc/mm. The hard‐sphere collision diameter corresponding to this is 8.01 Å. The result has been explained by Anderson's theory on the basis of dipole—quadrupole interaction. The quadrupole moment of carbon dioxide so evaluated is 5.37×10—26 esu.