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

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dc.contributor.author Du Plessis, A
dc.contributor.author Rohwer, EG
dc.contributor.author Steenkamp, CM
dc.date.accessioned 2007-09-10T08:40:06Z
dc.date.available 2007-09-10T08:40:06Z
dc.date.issued 2007
dc.identifier.citation Du Plessis, A, Rohwer, EG and Steenkamp, CM. 2007. Investigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jet. Journal of Molecular Spectroscopy, Vol. 243, pp 124-133 en
dc.identifier.issn 0022-2852
dc.identifier.uri http://hdl.handle.net/10204/1202
dc.description Copyright: 2007 Elsevier Inc en
dc.description.abstract The 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 (e3R sigma - X1sigma+(1, 0), d3delta - X1sigma+(5, 0), a beta sigma+ - X1sigma+(14, 0)) of 12C16O and band origins of six rovibronic bands (A1pi(v0 = 0–5) - X1sigma+(nuN = 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
dc.language.iso en en
dc.publisher Elsevier en
dc.subject Carbon monoxide en
dc.subject Isotopomer en
dc.subject Fourth positive system en
dc.subject Experimental conditions en
dc.subject Forbidden transitions en
dc.subject Supersonic jet en
dc.subject Laser-induced fluorescence en
dc.subject Vacuum ultraviolet en
dc.title Investigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jet en
dc.type Article en
dc.identifier.apacitation Du Plessis, A., Rohwer, E., & Steenkamp, C. (2007). Investigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jet. http://hdl.handle.net/10204/1202 en_ZA
dc.identifier.chicagocitation Du Plessis, A, EG Rohwer, and CM Steenkamp "Investigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jet." (2007) http://hdl.handle.net/10204/1202 en_ZA
dc.identifier.vancouvercitation Du Plessis A, Rohwer E, Steenkamp C. Investigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jet. 2007; http://hdl.handle.net/10204/1202. en_ZA
dc.identifier.ris TY - Article AU - Du Plessis, A AU - Rohwer, EG AU - Steenkamp, CM AB - The 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 (e3R sigma - X1sigma+(1, 0), d3delta - X1sigma+(5, 0), a beta sigma+ - X1sigma+(14, 0)) of 12C16O and band origins of six rovibronic bands (A1pi(v0 = 0–5) - X1sigma+(nuN = 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. DA - 2007 DB - ResearchSpace DP - CSIR KW - Carbon monoxide KW - Isotopomer KW - Fourth positive system KW - Experimental conditions KW - Forbidden transitions KW - Supersonic jet KW - Laser-induced fluorescence KW - Vacuum ultraviolet LK - https://researchspace.csir.co.za PY - 2007 SM - 0022-2852 T1 - Investigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jet TI - Investigation of four carbon monoxide isotopomers in natural abundance by laser-induced fluorescence in a supersonic jet UR - http://hdl.handle.net/10204/1202 ER - en_ZA


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