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Issue 45, 2013
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Absolute density measurement of SD radicals in a supersonic jet at the quantum-noise-limit

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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.

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

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Publication details

The article was received on 09 Aug 2013, accepted on 16 Oct 2013 and first published on 16 Oct 2013


Article type: Communication
DOI: 10.1039/C3CP53394H
Citation: Phys. Chem. Chem. Phys., 2013,15, 19575-19579
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    Absolute density measurement of SD radicals in a supersonic jet at the quantum-noise-limit

    A. Mizouri, L. Z. Deng, J. S. Eardley, N. H. Nahler, E. Wrede and D. Carty, Phys. Chem. Chem. Phys., 2013, 15, 19575
    DOI: 10.1039/C3CP53394H

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