Revisiting spontaneous Raman scattering for direct oxygen atom quantification

Alex W. van de Steeg, Luca Vialetto, Ana Filipa Sovelas da Silva, F.J.J. Peeters, Dirk C.M. van den Bekerom, Nicola Gatti, Paola Diomede, M.C.M. (Richard) van de Sanden, Gerard J. van Rooij (Corresponding author)

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8 Citations (Scopus)

Abstract

In this Letter, the counterintuitive and largely unknown Raman activity of oxygen atoms is evaluated for its capacity to determine absolute densities in gases with significant O-density. The study involves CO2 microwave plasma to generate a self-calibrating mixture and establish accurate cross sections for the 3𝑃2↔3𝑃1 and 3𝑃2↔3𝑃0 transitions. The approach requires conservation of stoichiometry, confirmed within experimental uncertainty by a 1D fluid model. The measurements yield 𝜎𝐽=2β†’1=5.27Β±rand:0.17sys:0.53Γ—10βˆ’31cm2/sr and 𝜎𝐽=2β†’0=2.11Β±rand:0.06sys:0.21Γ—10βˆ’31cm2/sr, and the detection limit is estimated to be 1Γ—1015cmβˆ’3 for systems without other scattering species.
Original languageEnglish
Pages (from-to)2172-2175
Number of pages4
JournalOptics Letters
Volume46
Issue number9
DOIs
Publication statusPublished - 1 May 2021

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