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)

Onderzoeksoutput: Bijdrage aan tijdschrift β€Ί Tijdschriftartikel β€Ί Academic β€Ί peer review

3 Citaten (Scopus)

Samenvatting

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.
Originele taal-2Engels
Pagina's (van-tot)2172-2175
Aantal pagina's4
TijdschriftOptics Letters
Volume46
Nummer van het tijdschrift9
DOI's
StatusGepubliceerd - 1 mei 2021

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