Coherent anti-Stokes Raman spectroscopy of shock-compressed liquid carbon monoxide–oxygen and nitrogen–oxygen mixtures
| Autor: | D. S. Moore, S. C. Schmidt, M. S. Shaw |
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| Rok vydání: | 1997 |
| Předmět: |
Compressed fluid
Analytical chemistry General Physics and Astronomy chemistry.chemical_element macromolecular substances Oxygen symbols.namesake chemistry.chemical_compound chemistry Molecular vibration symbols Coherent anti-Stokes Raman spectroscopy Physics::Chemical Physics Physical and Theoretical Chemistry Raman spectroscopy Carbon Raman scattering Carbon monoxide |
| Zdroj: | The Journal of Chemical Physics. 107:325-336 |
| ISSN: | 1089-7690 0021-9606 |
| Popis: | A two-stage light gas gun and single-pulse multiplex coherent anti-Stokes Raman scattering (CARS) have been used to obtain carbon monoxide, nitrogen, and oxygen vibrational spectra for several high-pressure/high-temperature, dense fluid, carbon monoxide–oxygen, and nitrogen–oxygen mixtures. The experimental spectra were compared to synthetic spectra calculated with a semiclassical model for CARS intensities and using best fit vibrational frequencies, peak Raman susceptibilities, and Raman linewidths for each mixture component. Up to a maximum shock pressure of 6.75 GPa for carbon monoxide–oxygen mixtures, the CO and O2 vibrational frequencies were found to increase monotonically with pressure and depended on the carbon monoxide–oxygen mixture ratio. For the nitrogen–oxygen mixtures, the N2 vibrational frequency increased monotonically with pressure to a maximum experimental pressure of 12.9 GPa, however the O2 vibrational frequency increased with pressure to about 11 GPa and then appeared to decrease slig... |
| Databáze: | OpenAIRE |
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