Quantitative far-infrared band strengths of iodine monochloride (ICl), a molten salt off-gas product

Kendall D. Hughey; Ashley M. Bradley; Heather M. Felmy; Andrew J. Clifford; Richard M. Cox; Amanda M. Lines; Samuel A. Bryan; Timothy J. Johnson

doi:10.1117/12.2557555

24 April 2020 Quantitative far-infrared band strengths of iodine monochloride (ICl), a molten salt off-gas product

Kendall D. Hughey, Ashley M. Bradley, Heather M. Felmy, Andrew J. Clifford, Richard M. Cox, Amanda M. Lines, Samuel A. Bryan, Timothy J. Johnson

Author Affiliations +

Proceedings Volume 11416, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXI; 114160Q (2020) https://doi.org/10.1117/12.2557555
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

The gaseous (by)products generated from molten salt reactors need to be monitored to prevent the release of potentially toxic gases to the environment. In particular, ¹²⁹I has a long half-life and its toxicity and persistence in the environment make iodine and iodine-containing compounds (such as ICl from chloride containing molten salt systems) of great concern. Optical spectroscopy tools, including Raman and Fourier-transform infrared (FTIR) spectroscopies, are ideal for monitoring and quantifying such off-gas products. Iodine (I₂) has a strong and distinct Raman signature and the change in signal with a change in concentration can be used for quantification of these byproducts. Iodine monochloride (ICl) has distinct signatures in both the Raman and the infrared, and its spectrum can also potentially be used for quantitative measurement of this species. In this paper we discuss our recent results on the quantification of iodine monochloride using infrared spectroscopy, in particular first reports of the absolute infrared band strength of ICl.

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Kendall D. Hughey, Ashley M. Bradley, Heather M. Felmy, Andrew J. Clifford, Richard M. Cox, Amanda M. Lines, Samuel A. Bryan, and Timothy J. Johnson "Quantitative far-infrared band strengths of iodine monochloride (ICl), a molten salt off-gas product", Proc. SPIE 11416, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXI, 114160Q (24 April 2020); https://doi.org/10.1117/12.2557555

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