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

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.

Supplementary information can be found at the end of the file (pages 17-24)

References in corpus (3)

• Radiocarbon Dioxide detection based on Cavity Ring-Down Spectroscopy and a Quantum Cascade Laser
• Broadband photoacoustic spectroscopy of ${}^{14}{\text{CH}}_4$ with a high-power mid-infrared optical frequency comb
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