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

Santeri Larnimaa, Lauri Halonen, Juho Karhu, Teemu Tomberg, Markus Metsälä, Guillaume Genoud, Tuomas Hieta, Steven Bell, Markku Vainio (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)


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.

Original languageEnglish
Article number137488
JournalChemical Physics Letters
Publication statusPublished - Jul 2020
MoE publication typeA1 Journal article-refereed


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


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