@article{bibcite_8764,
  author = {A. W. van de Steeg and L. Vialetto and A. F. Silva and F. J. J. Peeters and D. C. M. van den Bekerom and N. Gatti and P. Diomede and M. C. M. van de Sanden and G. J. van Rooij},
  title = {Revisiting spontaneous Raman scattering for direct oxygen atom quantification},
  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. The study involves CO$_{2}$ microwave plasma to generate a self-calibrating mixture and establish accurate cross-sections for the {\textthreesuperior}P$_{2}$<->{\textthreesuperior}P$_{1}$ and {\textthreesuperior}P$_{2}$<->{\textthreesuperior}P$_{0}$ transitions. The approach requires conservation of stoichiometry, which is confirmed within experimental uncertainty by a 1D fluid model. The measurements yield σ(J=2{\textrightarrow}1)=5.27{\textpm}(sys: 0.42)(rand: 0.16){\texttimes}10{\textasciimacron}{\textthreesuperior}{\textonesuperior} cm{\texttwosuperior}/sr and σ(J=2{\textrightarrow}0)=2.11{\textpm}(sys: 0.16)(rand: 0.06){\texttimes}10{\textasciimacron}{\textthreesuperior}{\textonesuperior} cm{\texttwosuperior}/sr and the detection limit is estimated to be 1{\texttimes}10{\textonesuperior}$^{5}$ cm{\textasciimacron}{\textthreesuperior} for systems without other scattering species.
},
  year = {2021},
  journal = {Optics Letters},
  volume = {46},
  pages = {2172-2175},
  month = {04/2021},
  publisher = {OSA},
  doi = {10.1364/OL.424102},
  language = {eng},
}