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Methane overtone absorption by intracavity laser spectroscopy

โœ Scribed by P.Vujkovic Cvijin; J.J. O'Brien; G.H. Atkinson; W.K. Wells; J.I. Lunine; D.M. Hunten

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
485 KB
Volume
159
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

The line intensity and self-broadening coefficient of the 619.68 nm overtone absorption line of methane are measured at room temperature using intracavity laser spectroscopy (ILS). The methodology appropriate for quantitative analysis of absorption lineshapes with ILS is determined by data recorded for several absorption lines of the well-studied oxygen y-band. The values for methane line intensity (s=O.l19+0.009 cm-' atm-' km-') and self-broadening coefficient (y,=O.O90? 0.007 cm-' atm-' ) found in this study are in agreement with previously published values obtained with other experimental techniques.

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โœ A. Campargue; M. Chenevier; F. Stoeckel ๐Ÿ“‚ Article ๐Ÿ“… 1991 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 429 KB

We report the CH-stretching overtone spectrum of jet-cooled methane in the visible range. Due to the very weak intensity of the transition, the intracavity-laser-absorption-spectroscopy technique (ICLAS) was used with a free jet of methane from a slit orifice placed inside a dye-laser cavity. In thi