18 September 1995 Double resonance vibrational overtone spectroscopy of CF3H in a supersonic free jet
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Abstract
A recently developed implementation of photofragment spectroscopy, based on specific properties of infrared multiphoton dissociation, has been applied for overtone spectroscopy of the CH stretch vibration in CF3H. The selectivity and sensitivity of this detection technique, called infrared laser assisted photofragment spectroscopy (IRLAPS), is high enough to combine it with both cooling in a supersonic expansion and infrared-near infrared double resonance excitation. This combination allows one to perform spectroscopy of high vibrational overtones of polyatomic molecules prepared in single J rotational states. The resulting simplification of the overtone spectra of the 42 vibrational level in CF3H provides a more accurate estimation of a timescale of intramolecular vibrational energy redistribution from CH chromophore group to the rest of the molecule.
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Oleg V. Boyarkin, Thomas R. Rizzo, "Double resonance vibrational overtone spectroscopy of CF3H in a supersonic free jet", Proc. SPIE 2548, Laser Techniques for State-Selected and State-to-State Chemistry III, (18 September 1995); doi: 10.1117/12.220853; https://doi.org/10.1117/12.220853
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