Temperature-Dependent, Nitrogen-Perturbed Line Shape Measurements in the ν1 + ν3 Band of Acetylene Using a Diode Laser Referenced to a Frequency Comb

被引:14
作者
Cich, Matthew J. [1 ]
Forthomme, Damien [2 ]
McRaven, Christopher P. [2 ]
Lopez, Gary V. [1 ]
Hall, Gregory E. [2 ]
Sears, Trevor J. [1 ,2 ]
Mantz, Arlan. W. [3 ]
机构
[1] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA
[2] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA
[3] Connecticut Coll, Dept Phys Astron & Geophys, New London, CT 06320 USA
关键词
LINESHAPE MODELS; ACETYLENE TRANSITIONS; SHIFT COEFFICIENTS; FREQUENCY ATLAS; BAND; C2H2; DOPPLER; AR; HE; (C2H2)-C-13;
D O I
10.1021/jp408960e
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The P(11) line of the nu(1) + nu(3) combination band of C2H2 was studied using an extended cavity diode laser locked to a frequency comb. Line shapes were measured for acetylene and nitrogen gas mixtures at a series of temperatures between 125 and 296 K and total pressures up to 1 atm. The data were fit to two speed-dependent line shape models and the results were compared. Line shape parameters were determined by simultaneously fitting data for all temperatures and pressures in a single multispectrum analysis. Earlier pure acetylene measurements [Cich et al. Appl. Phys. B 2012, 109, 373-38] were incorporated to account for self-perturbation. The resulting parameters reproduce the observed line shapes for the acetylene-nitrogen system over the range of temperatures and pressures studied with average root-mean-square observed-calculated errors of individual line measurement fits of approximately 0.01% of maximum transmission, close to the experimental signal-to-noise ratios. Errors in the pressure measurements constitute the major systematic errors in these measurements, and a statistical method is developed to quantify their effects on the line shape parameters for the present system.
引用
收藏
页码:13908 / 13918
页数:11
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