On the role of molecular clustering on infrared absorption line shapes of acetylene in a supersonic expansion

被引：15

作者：

Didriche, K. ^{[1
]}

Lauzin, C. ^{[1
]}

Macko, P. ^{[1
,2
]}

Lafferty, W. J. ^{[1
]}

Saykally, R. J. ^{[1
]}

Herman, M. ^{[1
]}

机构：

[1] Univ Libre Bruxelles, Fac Sci, Lab Chim Quant & Photophys, B-1050 Brussels, Belgium

[2] Comenius Univ, Fac Math Phys & Informat, Bratislava 84248, Slovakia

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 463卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2008.08.086

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 supersonic expansion containing acetylene seeded into Ar and produced from a circular nozzle is investigated using CW/cavity ring down spectroscopy, in the 1.5 mu m range. The results, also involving experiments with pure acetylene and acetylene-He expansions, as well as slit nozzles, demonstrate that the denser central section in the expansion is slightly heated by the formation of acetylene aggregates, resulting into a dip in the monomer absorption line profiles. Acetylene-Ar aggregates are also formed at the edge of the circular nozzle expansion cone. (C) 2008 Elsevier B. V. All rights reserved.

引用

页码：345 / 348

页数：4

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