To study overtone absorptions in condensed phases, a technique is presented which uses a piezoelectric detector, lock-in ampliticatlon and a cw dye laser modulated at frequencies from 10 to 120 kHz with an acousto-optic modulator. Acoustic resonance frequencies calculated for a cylindrical cell are
Dye laser photoacoustic overtone spectroscopy of CHBr3
β Scribed by Carlos Manzanares I; N.L.S. Yamasaki; Eric Weitz
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 403 KB
- Volume
- 144
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
Spectra of the v= 5 and v= 6. levels of the C-H stretch in CHBr, have been recorded via in-cavity dye laser photoacoustic spectroscopy. Linewidths for these absorptions have been determined and are discussed in light of existing theory and results on the linewidths of the corresponding transitions in CHCI,. When data on the fundamental are combined with v= 5 and v= 6 data it is possible to determine values for the local mode harmonic frequency and anharmonicity. Absolute absorption cross sections for the v= 5 and a= 6 levels are reported.
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