Photoacoustic optical frequency comb spectroscopy of radioactive methane in the mid-infrared region

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http://hdl.handle.net/10138/324431

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Karhu , J , Tomberg , T , Vieira , F S , Genoud , G , Hänninen , V , Vainio , M , Metsälä , M , Hieta , T , Bell , S & Halonen , L 2019 , Photoacoustic optical frequency comb spectroscopy of radioactive methane in the mid-infrared region . in 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) . IEEE , The 2019 Conference on Lasers & Electro-Optics / Europe and the European Quantum Electronics Conference (CLEO®/Europe-EQEC) , München , Germany , 23/06/2019 . https://doi.org/10.1109/CLEOE-EQEC.2019.8872587

Title: Photoacoustic optical frequency comb spectroscopy of radioactive methane in the mid-infrared region
Author: Karhu, Juho; Tomberg, Teemu; Vieira, Francisco Senna; Genoud, Guillaume; Hänninen, Vesa; Vainio, Markku; Metsälä, Markus; Hieta, Tuomas; Bell, Steven; Halonen, Lauri
Contributor: University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
University of Helsinki, Department
University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
University of Helsinki, Department of Chemistry
Publisher: IEEE
Date: 2019
Language: eng
Number of pages: 1
Belongs to series: 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
ISBN: 9781728104690
URI: http://hdl.handle.net/10138/324431
Abstract: The standard method for sensitive measurements of long-lived radioactive isotopes, such as 14C, is accelerator mass spectrometry (AMS). The AMS facilities are indispensable for applications like radiocarbon dating, but too expensive and massive for in-situ measurements. Laser spectroscopy, on the other hand, is a promising solution for isotope-selective detection of gas-phase compounds in applications that require low-cost instrumentation and on-site measurement capability. The recent work on laser spectroscopy of 14CO2 has led to impressive detection limits below the natural 14C abundance [1,2], which encourages us to develop similar techniques also for other radiocarbon compounds. Here, we report the first spectroscopic study of radioactive methane, 14CH4. Our work is motivated by a number of important applications, such as determining the biofraction of methane fuel mixtures and in-situ monitoring of radioactive gas emissions at decommissioning sites of light water nuclear reactors. © 2019 IEEE.
Subject: 116 Chemical sciences
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