Intensity measurements of methane lines in the 727 nm band studied by intracavity laser spectroscopy at temperatures down to 77 K

✍ Scribed by Kuldip Singh; James J. O'Brien

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 524 KB
• Volume: 229
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(94)01022-6

✦ Synopsis

A time-resolved, quasi-cw form of intracavity laser absorption spectroscopy has been used to measure intensities of vibrationrotation lines of methane in the 727 nm region. Temperatures of 77, 195 and 296 K are employed. A 0.68 meter long, low temperature absorption cell, enclosed inside the resonator cavity of a dye laser, has been used to obtain effective absorption pathlengths of 0.6-4.0 km. Intensities of several vibration-rotation methane lines obtained by directly fitting Voigt profiles to the absorption lines are reported for the first time for absorption in the 727 nm band.