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High-resolution analysis of the ν3 band of radiocarbon methane 14CH4

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Article number137488
Number of pages5
JournalChemical Physics Letters
Publication statusPublished - 2020
Publication typeA1 Journal article-refereed


We present the first high-resolution measurements and rotational analysis of the fundamental asymmetric stretching vibrational band ν3(F2) 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.


  • High-resolution spectroscopy, Infrared spectroscopy, Laser spectroscopy, Molecular spectroscopy, Radiocarbon compounds

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Field of science, Statistics Finland