Abstract

Temperatures can be measured from relative intensities of rotational Raman or rotational coherent anti-Stokes Raman scattering (CARS) from ground and vibrationally excited molecules, provided that relative Raman line strengths are known. Here rotational Raman line strengths are calculated and corrected for vibrational anharmonicity, for N2, O2, CO, and H2. These line-strength-correction factors for vibrational anharmonicity have a pronounced effect on temperature calculations; they lower temperatures previously calculated from O2 rotational CARS intensities at ~3000 K by more than 300 K.

© 1982 Optical Society of America

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