High resolution measurements of the line positions and strengths of the 2ν2 band of H2CO |
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Authors: | Robert A Toth |
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Institution: | Space Sciences Division, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91103 USA |
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Abstract: | Spectra of the 2ν2 band of formaldehyde have been obtained with high resolution (0.035 cm?1). Measurements were made with path lengths of 8, 16, and 24 m and at sample pressures from 0.1 to 0.3 mm Hg at room temperature (~296°K). From these data, the following constants were determined for the 2ν2 band in wavenumber units: v0=3471.718±0.004,A=9.3958±030013,B=1.28100±0.00024,C=1.11662±0.00024, Tbbb=-12.8±0.5×10-6,Taabb=60±5×10-6. The line strengths were also obtained from the data. The strengths were analyzed to determine the band strength and the rotational factors. At 296°K, the strength of the 2ν2 band was found to be 15.5 ± 0.9 cm?1/(cm·atm). |
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