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Proceedings Paper

Transient frequency-modulated spectroscopy: application to the measurement of vector and scalar correlations in molecular photodissociation
Author(s): Simon W. North; Gregory E. Hall
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Paper Abstract

An intrinsically time-resolved version of frequency- modulation (FM) spectroscopy has been recently developed and applied to the study of gas-phase photodissociation dynamics. Transient FM spectroscopy allows low background detection of radical species with shot-noise limited sensitivities, time resolution sufficient for detection of collision-less photoproducts, and frequency resolution characteristics of single-mode cw lasers. Methods for the quantitative analysis of Doppler-broadened FM line shapes to give velocity and rotational polarization information have been established permitting the measurement of scalar and vector properties of molecular fragmentation in exquisite detail. Several recent examples of the application of transient FM spectroscopy will be presented and discussed, including correlated scalar distributions in the dissociation of ketene from CH2 Doppler profiles, and the full vector correlation analysis of CN fragments arising from ICN dissociation.

Paper Details

Date Published: 15 May 1998
PDF: 8 pages
Proc. SPIE 3271, Laser Techniques for State-Selected and State-to-State Chemistry IV, (15 May 1998); doi: 10.1117/12.308399
Show Author Affiliations
Simon W. North, Texas A&M Univ. (United States)
Gregory E. Hall, Brookhaven National Lab. (United States)


Published in SPIE Proceedings Vol. 3271:
Laser Techniques for State-Selected and State-to-State Chemistry IV
John W. Hepburn; Robert E. Continetti; Mark A. Johnson, Editor(s)

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