Double resonance vibrational overtone spectroscopy of CF3H in a supersonic free jet

Oleg V. Boyarkin; Thomas R. Rizzo

doi:10.1117/12.220853

18 September 1995 Double resonance vibrational overtone spectroscopy of CF₃H in a supersonic free jet

Oleg V. Boyarkin, Thomas R. Rizzo

Proceedings Volume 2548, Laser Techniques for State-Selected and State-to-State Chemistry III; (1995) https://doi.org/10.1117/12.220853
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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.

Citation Download Citation

Oleg V. Boyarkin and 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); https://doi.org/10.1117/12.220853

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