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Selective detection of radicals and ions in a slit-jet discharge by degenerate and two-color four-wave mixing

Raghunandan, Ranjini and Mazzotti, Fabio J. and Chauhan, Richa and Tulej, Marek and Maier, John P.. (2009) Selective detection of radicals and ions in a slit-jet discharge by degenerate and two-color four-wave mixing. The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, and general theory, Vol. 113, No. 47. pp. 13402-13406.

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Official URL: http://edoc.unibas.ch/dok/A5251462

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Abstract

Degenerate four-wave mixing (DFWM) was used to record the spectra of charged and neutral carbon-containing radicals generated in a pulsed discharge source within a supersonic slit-jet expansion. Detection limits of 109 molecules cm−3 are achieved. The DFWM method allows a selective molecular detection by varying the discharge timings. Increased spectral selectivity is obtained by applying the two-color, doubly resonant four-wave mixing variant. This shows the potential of the techniques for sensitive and selective spectral analysis of radicals in discharges. The methods are successfully used for the detection of C4H, HC2S, and HC4H+ with signal-to-noise in the range of 102−104.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Physikalische Chemie (Maier)
UniBasel Contributors:Maier, John Paul and Raghunandan, Ranjini and Mazzotti, Fabio Jerome and Tulej, Marek and Chauhan, Richa
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Chemical Society
ISSN:1089-5639
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:23
Deposited On:22 Mar 2012 13:35

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