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Measurement of the perpendicular rotation-tunneling spectrum of the water dimer by tunable far infrared laser spectroscopy in a planar supersonic jet

Busarow, Kerry L. and Cohen, R. C. and Blake, Geoffrey A. and Laughlin, K. B. and Lee, Y. T. and Saykally, R. J. (1989) Measurement of the perpendicular rotation-tunneling spectrum of the water dimer by tunable far infrared laser spectroscopy in a planar supersonic jet. Journal of Chemical Physics, 90 (8). pp. 3937-3943. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:BUSjcp89

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Abstract

Fifty-six transitions from the K=1 lower-->K=2 lower tunneling–rotation band of water dimer have been measured and assigned at 22 cm^–1 by direct absorption spectroscopy in a cw planar supersonic jet expansion using a tunable far infrared laser spectrometer. Two different models were used to fit the data and several spectroscopic constants were determined for the upper and lower states. This work supports the local IAM model recently proposed by Coudert and Hougen for the hydrogen bond tunneling dynamics of the water dimer. This model includes four different tunneling motions, all of which contribute to the observed tunneling splittings. This is the most complicated hydrogen bonded system considered to be well understood at this time, at least in the lowest few K states.


Item Type:Article
Additional Information:Copyright © 1989 American Institute of Physics (Received 31 October 1988; accepted 19 December 1988) This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Chemical Sciences Division of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. The FIR laser system was funded by the National Science Foundation (Grant No. CHE-8612296). We thank Dr. J. T. Hougen and Dr. L. H. Coudert for their interest and guidance in this project.
Subject Keywords:WATER; DIMERS; INFRARED SPECTRA; LASER RADIATION; CHEMICAL BONDS; FAR INFRARED RADIATION; LASER SPECTROSCOPY
Record Number:CaltechAUTHORS:BUSjcp89
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:BUSjcp89
Alternative URL:http://dx.doi.org/10.1063/1.455804
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5234
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:05 Oct 2006
Last Modified:26 Dec 2012 09:04

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