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Broadband photoacoustic spectroscopy of 14CH4 with a high-power mid-infrared optical frequency comb
Umeå University, Faculty of Science and Technology, Department of Physics. University of Helsinki, Department of Chemistry, Helsinki, Finland.
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2019 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 44, no 5, p. 1142-1145Article in journal (Refereed) Published
Abstract [en]

We report a photoacoustic spectroscopy setup with a high-power mid-infrared frequency comb as the light source. The setup is used in broadband spectroscopy of radiocarbon methane. Owing to the high sensitivity of a cantilever-enhanced photoacoustic cell and the high-power light source, we can reach a detection limit below 100 ppb in a broadband measurement with a sample volume of only a few milliliters. The first infrared spectrum of (CH4)-C-14 is reported and given a preliminary assignment. The results lay a foundation for the development of optical detection systems for radiocarbon methane. 

Place, publisher, year, edition, pages
Optical Society of America, 2019. Vol. 44, no 5, p. 1142-1145
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Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:umu:diva-162500DOI: 10.1364/OL.44.001142ISI: 000460109200019PubMedID: 30821733OAI: oai:DiVA.org:umu-162500DiVA, id: diva2:1344804
Available from: 2019-08-22 Created: 2019-08-22 Last updated: 2019-08-22Bibliographically approved

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Vieira, Francisco Senna

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Karhu, JuhoVieira, Francisco SennaVainio, MarkkuMetsala, Markus
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