Observation of the C2H2-N2O van der Waals complex in the overtone range using CW-CRDS

被引：14
作者：
Didriche, K. [1 ]
Lauzin, C. [1 ]
Macko, P. [1 ,3 ]
Herman, M. [1 ]
Lafferty, W. J. [2 ]
机构：
[1] Univ Libre Bruxelles, Lab Chim Quant & Photophys, Fac Sci, B-1050 Brussels, Belgium
[2] Natl Inst Stand & Technol, Opt Technol Div, Gaithersburg, MD 20899 USA
[3] Comenius Univ, Fac Math Phys & Informat, Bratislava 84248, Slovakia
来源：
CHEMICAL PHYSICS LETTERS | 2009年 / 469卷 / 1-3期
关键词：
QUADRUPOLE HYPERFINE-STRUCTURE; NITROUS-OXIDE; MICROWAVE-SPECTRUM; OCS DIMER; SLIT JET; AR-HF; MU-M; SPECTROSCOPY; ACETYLENE; EXPANSION;
D O I：
10.1016/j.cplett.2008.12.037
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：
A slit nozzle supersonic expansion containing C2H2 (246 sccm) and N2O (355 sccm) seeded into Ar (1260 sccm) is investigated using CW cavity ring-down spectroscopy, in the 1.5 mu m range. The C2H2-N2O van der Waals complex is observed around the 2CH acetylenic band. Despite strong perturbations, 117 b-type lines are assigned. Their combined fit with published microwave data leads to new upper state and improved lower state rotational constants. The Lorentzian width of the assigned line profiles sets the mean lifetime to 1.6 ns. The rotational temperature is estimated to be 15 K from the comparison between observed and simulated spectra. (C) 2008 Elsevier B. V. All rights reserved.
引用
收藏
页码：35 / 37
页数：3
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