Observation of the Δv = -4 vibronic sequence of the C2 Swan system

被引：7

作者：

Yeung, Shun-Hin ^{[1
]}

Chan, Man-Chor ^{[1
]}

Wang, Na ^{[2
]}

Cheung, A. S-C ^{[2
]}

机构：

[1] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China

[2] Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2013年 / 557卷

关键词：

SPECTROSCOPY; C2;

D O I：

10.1016/j.cplett.2012.11.092

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：

In this Letter, we report the near infrared spectrum of C-2 generated in AC hollow-cathode discharges of ethylene/helium mixtures using high resolution laser absorption spectroscopy with concentration modulation. The high sensitivity achieved by this zero-background technique allows the first detection of the very weak Delta v = -4 sequence of the d(3)Pi(g) -> a(3)Pi(u) system (Swan system). The detailed analysis of the spectrum between 13 750 and 14130 cm(-1) revealed that the (4,8) band was heavily perturbed. On the other hand, the (5,9) band was unperturbed to yield accurate molecular constants from least-squares fitting of the observed transitions. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：31 / 36

页数：6

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