ON THE THEORY OF PURE ROTATIONAL TRANSITIONS FROM EXCITED VIBRATIONAL STATES OF TETRAHEDRAL MOLECULES
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Date
1972
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Ohio State University
Abstract
The possibility of pure rotational transitions arising from excited vibrational, but ground electronic, states of conventionally non-polar tetrahedral molecules has been previously suggested. A partial confirmation of this theory has been reported recently in the form of measurements of vibrationally-induced polar character in the $\nu_{3}$ state of several molecules of $T_{d}$ symmetry. However, corresponding absorption spectra have not yet been reported. Calculations of absolute intensities and frequencies of spectral lines will be presented. The effects of $T_{d}$ fine-structure splittings and nuclear-spin statistical weights will be discussed. Detailed results will be presented for $CH_{4}$.
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Author Institution: Department of Physics, and Astronomy, The University of Tennessee