Abstract
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 language | English |
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Article number | 137488 |
Journal | Chemical Physics Letters |
Volume | 750 |
DOIs | |
Publication status | Published - Jul 2020 |
MoE publication type | A1 Journal article-refereed |
Funding
Financial support of the Academy of Finland is acknowledged (Decisions 314363 and 294752). This work is part of the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decision 320168 . It was also funded through the European Metrology Programme for Innovation and Research (EMPIR) project “ 16ENV09 –MetroDecom 2”. EMPIR is cofinanced by the Participating States and from the European Union ’s Horizon 2020 research and innovation program. JK and TT acknowledge financial support from the Jenny and Antti Wihuri Foundation and CHEMS doctoral program of the University of Helsinki, respectively.
Keywords
- High-resolution spectroscopy
- Infrared spectroscopy
- Laser spectroscopy
- Molecular spectroscopy
- Radiocarbon compounds