LOW TEMPERATURE MILLIMETER WAVE DOUBLE RESONANCE OF METHYL FLUORIDE
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Date
1997
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Publisher
Ohio State University
Abstract
We have recently undertaken an investigation of molecular collision processes employing tine resolved double resonance techniques A millimeter wave - millimeter wave double refinance experiment becomes possible al low temperatures where, unlike at room temperature, a millimeter wave pump can induce large deviations from the thermal population distribution. We use the collisional cooling method to cool molecules to very low temperatures (around 4 K). Resonances which result from quasi-bound states, dominate low temperature pressure broadening cross sections and also contribute to low temperature rotational energy transfer In our first experiment, we have measured state-to-state; energy transfer rates for methyl fluoride (collisionally cooled by helium). We compare the pressure dependence of these rates with measured pressure broadening data.
Description
Author Institution: Department of Physics, The Ohio State University;