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Measurement of line strengths in the à 2A’ ← X˜ 2A” transition of HO2 and DO2
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SYSNO ASEP 0506626 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Measurement of line strengths in the à 2A’ ← X˜ 2A” transition of HO2 and DO2 Tvůrce(i) Assaf, E. (FR)
Asvany, O. (DE)
Votava, Ondřej (UFCH-W) RID, ORCID
Batut, S. (FR)
Schoemaecker, C. (FR)
Fittschen, Ch. (FR)Zdroj.dok. Journal of Quantitative Spectroscopy and Radiative Transfer. - : Elsevier - ISSN 0022-4073
Roč. 201, NOV 2017 (2017), s. 161-170Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova cw-CRDS ; DO2 radicals ; HO2 radicals ; Near infrared spectroscopy Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry Způsob publikování Omezený přístup Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000411544100017 EID SCOPUS 85024131324 DOI 10.1016/j.jqsrt.2017.07.004 Anotace The absorption spectrum of the à 2A’ ← X˜ 2A” 000–000 band of HO2 and DO2 radicals has been measured in the range 6941–7077 cm−1 with a resolution of around 0.005 cm−1. HO2 and DO2 radicals were generated from the reaction of Cl-atoms with CH3OH and CD3OD, respectively, whereby Cl-atoms were generated by pulsed photolysis of (COCl)2 at 248 nm. One time-resolved absorption curve was measured by cw-Cavity Ring Down Spectroscopy (cw-CRDS) for each wavelength. The relative absorption coefficient for each wavelength was then obtained from the ring down time τ, extrapolated to t = 0 s with respect to the photolysis pulse, and the ring down time τ0 before the photolysis pulse. Absolute absorption coefficients were quantified for several selected lines relative to a well characterized absorption line of HO2 at 6638.21 cm−1 by a second cw-CRDS absorption path. The maximum absorption cross section at 50 Torr Helium was for HO2 the transition N Ka Kc J = 11 0 11 11.5 ← 11 1 11 11.5 with σ7000.28 cm−1 = 2.12 × 10−19 cm2 and for DO2 the doublet transition N Ka Kc J = 18 1 18 18.5 ← 18 0 18 18.5 and 18 1 18 17.5 ← 18 0 18 17.5 with σ7019.83 cm−1 = 2.97 × 10−19 cm2. The full spectrum has been very well reproduced by employing spectroscopic data from earlier works. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2020 Elektronická adresa http://hdl.handle.net/11104/0297835
Počet záznamů: 1