Quadrupole Moment of OCS from Self-Broadening of Microwave Spectrum

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Abstract
Self‐broadening of the microwave absorption line of OCS (J=1→2 transition) has been explained by taking dipole—dipole, dipole—quadrupole, and quadrupole—quadrupole interactions simultaneously. The value of the quadrupole moment of OCS comes out to be 7.1×10—26 esu. The temperature dependence of the linewidth has also been explained on the basis of these mixed interactions taking this value of the quadrupole moment of OCS.