Quantitative determination of singlet oxygen density and temperature for Oxygen-Iodine Laser Applications

被引：18
作者：
Gupta, M
Owano, T
Baer, DS
O'Keefe, A
Williams, S
机构：
[1] Los Gatos Res Inc, Opt Div, Mountain View, CA 94041 USA
[2] USAF, Res Lab, Space Vehicles Directorate, Hanscom AFB, MA 01731 USA
来源：
CHEMICAL PHYSICS LETTERS | 2004年 / 400卷 / 1-3期
关键词：
D O I：
10.1016/j.cplett.2004.10.076
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 absolute density of singlet oxygen has been quantitatively determined using off-axis integrated cavity output spectroscopy to measure the Q(2)-Q(18) lines of the (0,0) band of the b(1)Sigma(g)(+) <--a(1)Delta(g) Noxon system near 1910 nm. Using derived values for the absorption cross-sections and a fitted rotational temperature of 295 K, a singlet oxygen density of 3 x 10(15) molecules CM-3 (5% conversion efficiency) was obtained in the afterglow of a 13.56 MHz RF discharge. The observed line spectrum for the Q(1 2) transition has a signal-to-noise ratio of 120:1 signifying that singlet oxygen densities as low as 2.5 x 10(13) molecules CM-3 are detectable. (C) 2004 Elsevier B.V. All rights reserved.
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页码：42 / 46
页数：5
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