Laser Stark spectroscopy of methyl cyanide in the 10-μm region: Analysis of the ν4 and ν7 bands,and the ν7, 3ν81 interaction |
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| Authors: | SA Rackley RJ Butcher M Römheld SM Freund T Oka |
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| Institution: | Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, United Kingdom;Herzberg Institute of Astrophysics, National Research Council of Canada, Ottawa, K1A 0R6, Canada |
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| Abstract: | About 550 Stark tuned resonances of the ν4 and ν7 vibration-rotation bands of CH3CN were measured using 12CO2, 13CO2, and N2O lasers. These data are combined with 26 microwave measurements and fitted to a model which includes l-type doubling in ν7, ν4-ν7 Coriolis coupling, and ν7-3ν81 Coriolis and Fermi couplings. The infrared and microwave data can be reproduced with standard deviations of 7 MHz and 40 kHz, respectively. The many vibration-rotation parameters and the dipole moments are determined with great accuracy. A complete list of derived parameters is given in Table I. |
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