New very sensitive double modulation techniques for the detection of high-resolution infrared absorption spectra of radicals, molecular ions, and excited states of stable molecules

Concepcion Maroto Domingo; Isabel Tanarro; M. M. Sanz; Juan Miguel Santos Santos; Dionisio Bermejo; C. Aroca

doi:10.1117/12.633722

17 June 1994 New very sensitive double modulation techniques for the detection of high-resolution infrared absorption spectra of radicals, molecular ions, and excited states of stable molecules

Concepcion Maroto Domingo, Isabel Tanarro, M. M. Sanz, Juan Miguel Santos Santos, Dionisio Bermejo, C. Aroca

Author Affiliations +

Proceedings Volume 2124, Laser Techniques for State-Selected and State-to-State Chemistry II; (1994) https://doi.org/10.1117/12.633722
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Two new double modulation techniques for infrared absorption spectroscopy of transient molecules are described. Both of them are based in the modulation in concentration of the unstable species and the modulation in amplitude of the laser radiation. One of the methods is specific for short lived transients; the first results obtained with it for the H3 + spectrum are given. The other one is more suitable for longer lived species; it has been applied to the study of the 113 band of CH3 and vibrational excited states of methane.

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Concepcion Maroto Domingo, Isabel Tanarro, M. M. Sanz, Juan Miguel Santos Santos, Dionisio Bermejo, and C. Aroca "New very sensitive double modulation techniques for the detection of high-resolution infrared absorption spectra of radicals, molecular ions, and excited states of stable molecules", Proc. SPIE 2124, Laser Techniques for State-Selected and State-to-State Chemistry II, (17 June 1994); https://doi.org/10.1117/12.633722

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