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Title: Revisiting spontaneous Raman scattering for direct oxygen atom quantification

Journal Article · · Optics Letters
DOI:https://doi.org/10.1364/ol.424102· OSTI ID:1877143
ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [2];  [3];  [4];  [1];  [5]
  1. DIFFER, Eindhoven (The Netherlands)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. DIFFER, Eindhoven (The Netherlands); Univ. degli Studi di Trento (Italy)
  4. Maastricht University (The Netherlands)
  5. DIFFER, Eindhoven (The Netherlands); Maastricht University (The Netherlands)

In this paper, 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 C O 2 microwave plasma to generate a self-calibrating mixture and establish accurate cross sections for the 3 P 2 3 P 1 and 3 P 2 3 P 0 transitions. The approach requires conservation of stoichiometry, confirmed within experimental uncertainty by a 1D fluid model. The measurements yield σ J = 2 1 = 5.27 ± s y s : 0.53 r a n d : 0.17 × 10 - 31 c m 2 / s r and σ J = 2 0 = 2.11 ± s y s : 0.21 r a n d : 0.06 × 10 - 31 c m 2 / s r , and the detection limit is estimated to be 1 × 10 15 c m - 3 for systems without other scattering species.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003525
OSTI ID:
1877143
Report Number(s):
SAND2022-8518J; 707667; TRN: US2307375
Journal Information:
Optics Letters, Vol. 46, Issue 9; ISSN 0146-9592
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English

References (18)

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The importance of thermal dissociation in CO 2 microwave discharges investigated by power pulsing and rotational Raman scattering journal May 2019
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