High-resolution analysis of the ${\nu_3}$ band of radiocarbon methane $^{14}CH_{4}

We present the first high-resolution measurements and rotational analysis of the fundamental asymmetric stretching vibrational band ${\nu_3}(F_2)$ of radiocarbon methane. A spectrometer consisting of a mid-infrared continuous-wave optical parametric oscillator and a cantilever-enhanced photoacoustic...

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Main Authors Larnimaa, Santeri, Halonen, Lauri, Karhu, Juho, Tomberg, Teemu, Metsälä, Markus, Genoud, Guillaume, Hieta, Tuomas, Bell, Steven, Vainio, Markku
Format Journal Article
LanguageEnglish
Published 16.04.2020
Subjects
Physics - Chemical Physics
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Summary:We present the first high-resolution measurements and rotational analysis of the fundamental asymmetric stretching vibrational band ${\nu_3}(F_2)$ of radiocarbon methane. A spectrometer consisting of a mid-infrared continuous-wave optical parametric oscillator and a cantilever-enhanced photoacoustic detector was employed to determine the wavenumbers of 43 rovibrational lines. A spectroscopic model could reproduce all the observed transition wavenumbers within the accuracy of the experiment. Our work contributes to the development of radiocarbon methane detectors based on laser spectroscopy.
DOI:10.48550/arxiv.2004.07518