dc.creator Pearson, John C. en_US dc.creator Yu, Shanshan en_US dc.creator Drouin, Brian J. en_US dc.date.accessioned 2012-07-09T19:14:50Z dc.date.available 2012-07-09T19:14:50Z dc.date.issued 2012 en_US dc.identifier 2012-RF-12 en_US dc.identifier.uri http://hdl.handle.net/1811/52273 dc.description Author Institution: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109 en_US dc.description.abstract Theory and analysis of three-fold internal rotors is a well established science allowing for a wide variety of molecules to be successfully analyzed to experimental accuracy. However, once the three-fold symmetry is broken with the substitution of a single deuterium, the problem becomes much less well described either theoretically or experimentally. CH$_2$DOH is rapidly formed on grains in the interstellar medium at low temperatures where it is energetically favorable for atomic deuterium to replace hydrogen in the methyl rotor of methanol. Additionally, the three equivalent ways to substitute in the methyl rotor suggest that CH$_2$DOH will be at least three times as abundant as CH$_3$OD. The observational evidence does not always support this assertion potentially because the intensities of CH$_2$DOH are poorly understood. An analysis of over 8000 transitions in the three torsional substates of the ground torsional state of CH$_2$DOH will be presented. Analysis of the data set shows a number of pathologies both in the energy level structure as well as with the labeling of transitions for this class of molecules. The analysis shows some surprising deviations from available theory. A number of assignments and pathologies in the excited torsional states will be presented as well. en_US dc.language.iso en en_US dc.publisher Ohio State University en_US dc.title ASSIGNMENTS, PERTURBATIONS, PATHOLOGIES AND A ROTATIONAL ANALYSIS OF THE SPECTRUM OF CH$_2$DOH en_US dc.type Article en_US dc.type Image en_US dc.type Presentation en_US
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