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FIR LASER STARK SPECTROSCOPY OF $CH_{3}OH$ AT $190 \mu m$ and $195 \mu m$.
G. R. Sudhakaran, Indranath Mukhopadhyay, J. C. Sarker, R. L. Bhattacharjee, Lawrence H. Johnston
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Abstract
The FIR laser Stark spectrum of methanol has been investigated at $\\lambda = 190 \\mu m$ and $195 \\mu m$ of the DCN laser. The spectrum has been taken up to 60,000 volts/cm both parallel and perpendicular polarizations. The low field structure observed with the $190 \\mu m$ line is assigned as the $J_{k} = 173 \\leftarrow 162 E_{2}. v_{t} = 0$ torsional state. A relatively strong transition observed with the $195 \\mu m$ and also the $195 \\mu m$ line is tentatively identified as the $J_{k} = 114 \\leftarrow 103 E_{1}, v_{t} = 0$ torsional state.