Pressure broadening coefficients of ν5 fundamental band lines of CH3I at 7 μm measured by diode laser absorption spectroscopy
作者： K.J. Hoffman , P.B. Davies
DOI: 10.1016/J.JMS.2008.07.004
关键词: Methyl iodide 、 Laser 、 Doppler broadening 、 Nitrogen 、 Line (formation) 、 Absorption spectroscopy 、 Materials science 、 Infrared 、 Voigt profile 、 Analytical chemistry 、 Nuclear magnetic resonance
摘要: Abstract We have measured the room temperature pressure broadening coefficients, γ , of over 100 lines in five Q-branches ν 5 perpendicular band methyl iodide ( 12 CH 3 I) using tuneable diode laser absorption spectroscopy. The profiles individual P Q 2 4 6 and R branches were recorded a 1 m long White cell at nitrogen or oxygen pressures up to 15 Torr. fitted Voigt profile obtain collision broadened line widths. Within coefficients decreased monotonically with increasing J for varied between 0.19 cm −1 atm low 0.12 cm high . corresponding approximately 20% smaller. Self also several found be ∼4 times higher than values.
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