Abstract
A simple new technique is described to infer the pressure-induced self-broadening coefficients for absorption lines in gases in the Voigt profile regime. The technique is described for several absorption lines in the v1 + 3v3 overtone band of acetylene. The technique involves measurement of absorption signal at even harmonics of wavelength modulation and gas pressures from 1-600 Torr in the cell. The variation of the signal with cell pressure shows a characteristic extremum that can be uniquely correlated to the self-broadening coefficient.
| Original language | English |
|---|---|
| Pages (from-to) | 733-740 |
| Number of pages | 8 |
| Journal | Journal of Quantitative Spectroscopy and Radiative Transfer |
| Volume | 72 |
| Issue number | 5 |
| DOIs | |
| State | Published - Mar 1 2002 |
ASJC Scopus Subject Areas
- Radiation
- Atomic and Molecular Physics, and Optics
- Spectroscopy
Keywords
- Harmonic detection
- Tunable diode lasers
- Voigt profile
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