High-resolution analysis of the 3 band of radiocarbon methane 14CH4
Abstract
We present the first high-resolution measurements and rotational analysis of the fundamental asymmetric stretching vibrational band 3(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.
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