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

Autor:	Manish Gupta, Thomas Owano, Anthony O'Keefe, Skip Williams, Douglas S. Baer
Rok vydání:	2004
Předmět:	Singlet oxygen Energy conversion efficiency Analytical chemistry General Physics and Astronomy chemistry.chemical_element Rotational temperature Oxygen Afterglow chemistry.chemical_compound chemistry Emission spectrum Physical and Theoretical Chemistry Absorption (chemistry) Spectroscopy
Zdroj:	Chemical Physics Letters. 400:42-46
ISSN:	0009-2614
DOI:	10.1016/j.cplett.2004.10.076
Popis:	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 Σ g + ← a 1 Δ 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 × 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(12) transition has a signal-to-noise ratio of 120:1 signifying that singlet oxygen densities as low as 2.5 × 10 13 molecules cm −3 are detectable.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::28625866effb7cdd6d2ac0e6bec4dfa4 https://doi.org/10.1016/j.cplett.2004.10.076 Zobrazit plný text záznamu Full Text from ScienceDirect