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arXiv · 2108.13031

Infrared spectroscopy of radioactive hydrogen chloride H$^{36}\!$Cl

Santeri Larnimaa·Markku Vainio·Ville Ulvila
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Abstract

We present the first report of optical absorption spectroscopy of H$^{36}\!$Cl, a radioactive isotopologue of hydrogen chloride. We used Fourier-transform infrared spectroscopy to determine the line center wavenumbers of the fundamental rovibrational band lines P(10)-R(10) and the first overtone band lines P(1)-R(7) with total uncertainty of less than 0.0018 cm$^{-1}$ (60 MHz) and 0.007 cm$^{-1}$ (0.2 GHz), respectively, at 68 % confidence level. We also performed a rotational analysis on the bands to determine the related molecular constants. We further compared the linewidths and relative intensities of the lines to those of the stable isotopologues H$^{35}\!$Cl and H$^{37}\!$Cl. The new spectroscopic information assists in developing optical instrumentation for the detection of H$^{36}\!$Cl.

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Santeri Larnimaa, Markku Vainio, Ville Ulvila. 2021-08-30. Infrared spectroscopy of radioactive hydrogen chloride H$^{36}\!$Cl. https://doi.org/10.1016/j.jqsrt.2021.107984

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