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Proceedings Paper

Time-resolved coherent anti-Stokes Raman spectroscopy and the measurement of vibrational spectra in shock-compressed molecular materials
Author(s): David S. Moore; Stephen C. Schmidt
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Paper Abstract

We present the use of coherent anti-Stokes Raman scattering (CARS) in conjunctiOn with a two-stage light-gas gun to obtain vibrational spectra of shock-compressed liquid N2, 02, CO. and their mixtures. The experimental spectra are compared to spectra calculated using a semiclassical model for CARS intensities to obtain vibrational frequencies, peak Raman susceptibilities, and linewidths. The derived spectroscopic parameters suggest thermal equilibrium of the vibrational populations is established in less than a few nanoseconds after shock passage. Vibrational temperatures obtained are compared to those derived from equation-of-state calculations. Shifts in the vibrational frequencies reflect the influence of increased density and temperature on the intramolecular motion.

Paper Details

Date Published: 1 December 1990
PDF: 7 pages
Proc. SPIE 1318, Optical Spectroscopic Instrumentation and Techniques for the 1990s: Applications in Astronomy, Chemistry, and Physics, (1 December 1990); doi: 10.1117/12.22091
Show Author Affiliations
David S. Moore, Los Alamos National Lab. (United States)
Stephen C. Schmidt, Los Alamos National Lab. (United States)


Published in SPIE Proceedings Vol. 1318:
Optical Spectroscopic Instrumentation and Techniques for the 1990s: Applications in Astronomy, Chemistry, and Physics
Bernard J. McNamara; Jeremy M. Lerner, Editor(s)

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