Infrared spectroscopy of radioactive hydrogen chloride H36Cl

Santeri Larnimaa; Markku Vainio; Ville Ulvila

doi:10.1016/j.jqsrt.2021.107984

Infrared spectroscopy of radioactive hydrogen chloride H³⁶Cl

Santeri Larnimaa^*, Markku Vainio, Ville Ulvila

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

5 Citations (Scopus)

Abstract

We present the first report of optical absorption spectroscopy of H³⁶Cl, 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 H³⁵Cl and H³⁷Cl. The new spectroscopic information assists in developing optical instrumentation for the detection of H³⁶Cl.

Original language	English
Article number	107984
Journal	Journal of Quantitative Spectroscopy and Radiative Transfer
Volume	277
DOIs	https://doi.org/10.1016/j.jqsrt.2021.107984
Publication status	Published - Jan 2022
MoE publication type	A1 Journal article-refereed

Funding

This work obtained funding from the Euratom research and training programme 2014–2018 [Grant agreement No. 755371, the CHANCE project]; the Academy of Finland [Project No. 326444]; and the Flagship on Photonics Research and Innovation of the Academy of Finland (PREIN). S. Larnimaa acknowledges financial support from the CHEMS doctoral program of the University of Helsinki.

Keywords

Fourier-transform infrared spectroscopy FTIR
Line center wavenumber
Molecular constant
Radioactive hydrogen chloride HCl
Rotational-vibrational spectroscopy

Access to Document

10.1016/j.jqsrt.2021.107984

Cite this

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title = "Infrared spectroscopy of radioactive hydrogen chloride H36Cl",

abstract = "We present the first report of optical absorption spectroscopy of H36Cl, 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 H35Cl and H37Cl. The new spectroscopic information assists in developing optical instrumentation for the detection of H36Cl.",

keywords = "Fourier-transform infrared spectroscopy FTIR, Line center wavenumber, Molecular constant, Radioactive hydrogen chloride HCl, Rotational-vibrational spectroscopy",

author = "Santeri Larnimaa and Markku Vainio and Ville Ulvila",

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AU - Vainio, Markku

AU - Ulvila, Ville

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N2 - We present the first report of optical absorption spectroscopy of H36Cl, 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 H35Cl and H37Cl. The new spectroscopic information assists in developing optical instrumentation for the detection of H36Cl.

AB - We present the first report of optical absorption spectroscopy of H36Cl, 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 H35Cl and H37Cl. The new spectroscopic information assists in developing optical instrumentation for the detection of H36Cl.

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KW - Rotational-vibrational spectroscopy

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