Line strengths of the ν1 + ν4 band of 12CH4 |
| |
Authors: | Linda R Brown |
| |
Institution: | Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109 USA |
| |
Abstract: | The line strengths of the ν1 + ν4 band of 12CH4 at 4223.5 cm?1 were measured using a leastsquares procedure that iterates between the observed spectrum and a synthetic spectrum calculated at correct instrumental and gas sample conditions. The methane spectrum was recorded at 0.011 cm?1 resolution with signal-to-noise ratios of 300 to 1 or better using a Fourier transform spectrometer at Kitt Peak National Observatory. Line assignments were evaluated and extended to upper state J of 13. The observed line strengths reflect significant perturbation by other states so that only portions of the band can be used to determine a band strength of 6.92 (2) cm?2 atm?1 at 296 K with a Herman-Wallis factor of (1 – 0.0035(2)m)2. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|