The Ground and First Excited Torsional States of Acetic Acid |
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| Authors: | Ilyushin V V Alekseev E A Dyubko S F Podnos S V Kleiner I Margulès L Wlodarczak G Demaison J Cosléou J Maté B Karyakin E N Golubiatnikov G Yu Fraser G T Suenram R D Hougen J T |
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| Institution: | Institute of Radio Astronomy of NASU, Krasnoznamennaya 4, Kharkov, 310002, Ukraine |
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| Abstract: | A global fit of microwave and millimeter-wave rotational transitions in the ground and first excited torsional states (v(t) = 0 and 1) of acetic acid (CH(3)COOH) is reported, which combines older measurements from the literature with new measurements from Kharkov, Lille, and NIST. The fit uses a model developed initially for acetaldehyde and methanol-type internal rotor molecules. It requires 34 parameters to achieve a unitless weighted standard deviation of 0.84 for a total of 2518 data and includes A- and E-species transitions with J
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