Infrared-microwave double resonance study of the ν4 fundamental band of POF3 |
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Authors: | T Amano RH Schwendeman |
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Institution: | Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA |
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Abstract: | Three-level and four-level infrared-microwave double resonance effects have been observed in a POF3 sample contained in a microwave waveguide Stark cell that was modified to permit transmission of radiation from a CO2 infrared gas laser. In three-level double resonance experiments laser pumping of rotational states in the ν4 = 1 vibrational state greatly increased the signal/noise for observation of Stark-shifted rotational transitions in the excited vibrational state. The frequencies of the observed excited state transitions were used to confirm the assignment of laser Stark spectra and to obtain independent measures of the rotational constant B and the dipole moment for ν4 = 1. The observation of four level double resonances could be explained qualitatively by the assumption of dipole selection rules for collision-induced transitions. However, the intensities of the double-resonance effects could not be explained by this simple model. |
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