Investigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jet

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dc.contributor.authorDu Plessis, Antonen_ZA
dc.contributor.authorRohwer, Erich G.en_ZA
dc.contributor.authorSteenkamp, Christine M.en_ZA
dc.date.accessioned2020-03-09T12:26:20Z
dc.date.available2020-03-09T12:26:20Z
dc.date.issued2007
dc.descriptionCITATION: Du Plessis, A., Rohwer, E. G. & Steenkamp, C. M. 2007. Investigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jet. Journal of Molecular Spectroscopy, 243(2):124-133, doi:10.1016/j.jms.2007.01.009.
dc.descriptionThe original publication is available at https://www.sciencedirect.com/journal/journal-of-molecular-spectroscopy
dc.description.abstractThe four carbon monoxide (CO) isotopomers 12C16O, 13C16O, 12C18O and 12C17O have been detected simultaneously in a CO gas sample of natural isotopic abundance by measuring rovibronic excitation spectra of six vibronic bands in the Fourth Positive System. The CO sample was flow cooled by adiabatic expansion in a pulsed supersonic jet. The rovibronic excitation spectra were obtained using a novel pulsed laser source (pulse duration ∼25 ns, spectral bandwidth ∼5 GHz) continuously tunable in the 139–155 nm vacuum ultraviolet wavelength region for excitation and recording the total fluorescence. In the present paper we report on the spectroscopic results obtained, including transition wavelengths of three forbidden rovibronic bands (e3Σ− − X1Σ+(1, 0), d3Δ − X1Σ+(5, 0), a′3Σ+ − X1Σ+(14, 0)) of 12C16O and band origins of six rovibronic bands (A1Π(v′ = 0–5) − X1Σ+(v″ = 0)) of the rare isotopomer 12C17O, and on the experimental conditions facilitating the high sensitivity of the measurements. The exceptional sensitivity demonstrated by the results has been achieved by fine tuning experimental conditions including the conditions in the supersonic expansion, the jet pulse duration and the laser pulse timing.en_ZA
dc.description.urihttps://www.sciencedirect.com/science/article/pii/S0022285207000264
dc.description.versionPost-print
dc.format.extent30 pages
dc.identifier.citationDu Plessis, A., Rohwer, E. G. & Steenkamp, C. M. 2007. Investigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jet. Journal of Molecular Spectroscopy, 243(2):124-133, doi:10.1016/j.jms.2007.01.009.
dc.identifier.issn0022-2852 (online)
dc.identifier.otherdoi:10.1016/j.jms.2007.01.009
dc.identifier.urihttp://hdl.handle.net/10019.1/107598
dc.language.isoen_ZAen_ZA
dc.publisherElsevier
dc.subjectVacuum ultraviolet radiationen_ZA
dc.subjectCarbon monoxideen_ZA
dc.subjectIsotopomeren_ZA
dc.subjectWavelengthsen_ZA
dc.subjectVibronic spectroscopyen_ZA
dc.subjectPulsed laser depositionen_ZA
dc.subjectUntrasonic wavesen_ZA
dc.titleInvestigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jeten_ZA
dc.typeArticleen_ZA
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