Time resolved study of vibrational relaxation in solid CO2 at high pressures
โ Scribed by Michael Baggen; Ad Lagendijk
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 424 KB
- Volume
- 177
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
The vibrational coherence relaxation of the S2, bound state of the Fermi dyad vI:2v2 in solid CO2 is studied with the timeresolved stimulated Raman technique as a function of temperature for pressures up to 4.4 GPa. The relaxation is determined by a competition between two contributions: a down-conversion process with a weak pressure dependence, and a pure dephasing process, the latter becoming dominant at higher pressures.
๐ SIMILAR VOLUMES
The Raman spectra of the bound states a, and 0of the Fermi diad w,:202 in crystalline COz have been measured at several temperatures under very high resolution. Band profiles have been determined for each of the two factor group components, one A, and one F,, of the two states. The evolution with t
Time-resolved coherent Raman measurements at low temperature are performed on strain-free crystals at high pressure and on highly strained crystals following a pressure release. Results for several Raman modes of naphthalene and carbon disulfide are analyzed in terms of a competition between vibrati