Absolute density measurement of SD radicals in a supersonic jet at the quantum-noise-limit

Mizouri, A.; Deng, L.; Eardley, J.S.; Nahler, N.H.; Wrede, E.; Carty, D.

Abstract

The absolute density of SD radicals in a supersonic jet has been measured down to (1.1 ± 0.1) × 105 cm−3 in a modestly specified apparatus that uses a cross-correlated combination of cavity ring-down and laser-induced fluorescence detection. Such a density corresponds to 215 ± 21 molecules in the probe volume at any given time. The minimum detectable absorption coefficient was quantum-noise-limited and measured to be (7.9 ± 0.6) × 10−11 cm−1, in 200 s of acquisition time, corresponding to a noise-equivalent absorption sensitivity for the apparatus of (1.6 ± 0.1) × 10−9 cm−1 Hz−1/2.

Citation

Mizouri, A., Deng, L., Eardley, J., Nahler, N., Wrede, E., & Carty, D. (2013). Absolute density measurement of SD radicals in a supersonic jet at the quantum-noise-limit. Physical Chemistry Chemical Physics, 15(45), 19575-19579. https://doi.org/10.1039/c3cp53394h

• Journal Article Type: Article
• Publication Date: Oct 1, 2013
• Deposit Date: Oct 18, 2013
• Publicly Available Date: May 20, 2014
• Journal: Physical Chemistry Chemical Physics
• Print ISSN: 1463-9076
• Electronic ISSN: 1463-9084
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 15
• Issue: 45
• Pages: 19575-19579
• DOI: https://doi.org/10.1039/c3cp53394h
• Public URL: https://durham-repository.worktribe.com/output/1467890