Diode laser measurements of strengths,half-widths,and temperature dependence of half-widths for CO2 spectral lines near 4.2 μm |
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Authors: | V Malathy Devi B Fridovich G.D Jones D.G.S Snyder |
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Affiliation: | 1. National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, Washington, D. C. 20233 USA;2. Information Service, Washington, D. C. 20233 USA |
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Abstract: | Absolute line strengths have been measured at room temperature for spectral lines in the R branch of the ν3 band of 12C16O2, 12C16O18O, and 12C16O17O and the (ν2 + ν3) ? ν2 and (ν1 + ν3) ? ν1 bands of 12C16O2 in the region 2365–2393 cm?1 using a tunable diode laser spectrometer; from these measurements band strengths have been computed. Self- and nitrogen-broadened half-widths have been measured for some ν3 lines of 12C16O2 and 12C16O17O, and nitrogen-broadened half-widths measured for some (ν2 + ν3) ? ν2 band lines of 12C16O2. From measurements made over a temperature range from 217 to 299 K we have obtained temperature coefficients n, for the N2-broadened Lorentz half-width defined as , for the ν3 and (ν2 + ν3) ? ν2 bands of 12C16O2. They are 0.757 ± 0.008 and 0.789 ± 0.015, respectively. |
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