dc.creator Pearson, J. C. en_US dc.creator Yu, S. en_US dc.creator Drouin, B. J. en_US dc.creator Pirali, O. en_US dc.creator Martin, M.-A. en_US dc.creator Vervloet, M. en_US dc.creator Balcon, D. en_US dc.creator Endres, C. P. en_US dc.date.accessioned 2010-07-12T14:17:20Z dc.date.available 2010-07-12T14:17:20Z dc.date.issued 2010 en_US dc.identifier 2010-RC-02 en_US dc.identifier.uri http://hdl.handle.net/1811/46296 dc.description Author Institution: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA; Ligne AILES--Synchrotron SOLEIL, L'Orme des Merisiers Saint-Aubin, 91192 Gif-sur-Yvette, France; I. Physikalisches Institut, Universitat zu Koln, 50937 Koln, Germany en_US dc.description.abstract The problem of coupling between a large amplitude motion state and a small amplitude vibration state remains an area of considerable interest and few conclusions in molecular physics. The $\nu_4$ and $2\nu_2$ states of NH$_3$ provide an excellent opportunity to study the coupling of large and small amplitude motions in an inversion system where the quantum mechanics have been worked out in detail . In spite of the well established Hamiltonian, a large body of high quality spectra remains to fit to experimental accuracy. Several recent studies have resulted in 2-10 times the infrared accuracy over restricted ranges of quantum numbers and have either been unable to fit or have completely ignored the 162 reported microwave transitions . Assessment of the perturbations details provides some insight into why previous analyses might have not completely succeeded; however, the ability of current Hamiltonian to completely model the large amplitude inversion coupled with small amplitude vibration remains to be adequately addressed. We report extensive new measurements of the rotation-inversion transitions in the $\nu_4$ and $2\nu_2$ states, a global analysis of existing data and provide a complete assessment of the inversion-rotation-vibration Hamiltonian in NH$_3$. en_US dc.language.iso en en_US dc.publisher Ohio State University en_US dc.title CAN THE INVERSION-VIBRATION-ROTATION PROBLEM IN THE $\nu_4$ AND $2\nu_2$ STATES OF NH$_3$ BE SOLVED TO EXPERIMENTAL ACCURACY? en_US dc.type Article en_US dc.type Image en_US dc.type Presentation en_US
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