The absorption spectrum and absolute absorption cross sections of acetylperoxy radicals, CH3C(O)O2 in the near IR

被引：3
|
作者：
Rolletter, Michael [1 ]
Assaf, Emmanuel [2 ,3 ]
Assali, Mohamed [2 ]
Fuchs, Hendrik [1 ]
Fittschen, Christa [2 ]
机构：
[1] Forschungszentrum Julich, Inst Energy & Climate Res, IEK 8 Troposphere, D-52428 Julich, Germany
[2] Univ Lille, PC2A Physicochim Proc Combust & Atmosphere, CNRS, UMR 8522, F-59000 Lille, France
[3] NOAA, Earth Syst Res Lab, Chem Sci Div, Boulder, CO 80305 USA
来源：
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2020年 / 245卷
基金：
欧洲研究理事会;
关键词：
RING-DOWN SPECTROSCOPY; GAS-PHASE REACTIONS; ATMOSPHERIC CHEMISTRY; PHOTOCHEMICAL DATA; PEROXY-RADICALS; SELF-REACTION; 2-NU(1) BAND; KINETICS; HO2; OH;
D O I：
10.1016/j.jqsrt.2020.106877
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The (A) over tilde-(X) over tilde electronic transition of acetylperoxy radicals (CH3C(O)O-2) in the near-infrared was measured at 67hPa synthetic air in the spectral ranges from 6094 cm(-1) to 6180 cm(-1) and 6420 cm(-1) to 6600 cm(-1). CH3C(O)O-2 radicals were generated by the pulsed photolysis of a acetaldehyde/Cl-2/O-2 mixture at 351 nm and subsequently measured by time-resolved continuous-wave cavity ring-down spectroscopy (cw-CRDS). The absorption cross sections of eight discrete absorption lines were determined relative to the absorption cross section of HO2, which has previously been reported. The strongest absorption cross section was found at 6510.73 cm(-1) and was determined to be (4.9 +/- 2.5) 10(-20) cm(2). (C) 2020 The Authors. Published by Elsevier Ltd.
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页数：6
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