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Electronic spectroscopy of UF6 and WF6 by electron impact

Rianda, Ronald and Frueholz, Robert P. and Kuppermann, Aron (1979) Electronic spectroscopy of UF6 and WF6 by electron impact. Journal of Chemical Physics, 70 (2). pp. 1056-1061. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:RIAjcp79

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Abstract

The electron-impact excitation spectra of uranium hexafluoride (UF6) and tungsten hexafluoride (WF6) have been studied experimentally at impact energies of 30, 50, and 75 eV and at scattering angles from 5° to 80°. Eleven features in UF6 are observed with maxima at 3.26, 4.2, ~4.7, 5.8, 7.0, 7.86, 9.26, 11.01, 11.75, 12.5, and 13.2 eV. Four features in WF6 are observed with maximum intensity at 7.25, 7.9, 8.5, and 9.85, in good agreement with optical work. In addition, three previously unobserved features in WF6 at 11.75, 12.6, and 13.5 eV are reported. Similarity between the spectra of UF6 and WF6 suggests that the primary contribution to the absorption intensity in UF6 above 5.8 eV and in WF6 results from charge transfer transitions from fluorine p orbitals to metal d orbitals. Tentative assignments based in part on recent theoretical studies are made.


Item Type:Article
Additional Information:Copyright © 1979 American Institute of Physics. (Received 21 March 1978) The authors express their appreciation to Professor H.B. Gray for useful discussions. This work was supported by the Department of Energy (Contract No. EX-76-G-03-1305). Work completed [by R.R.] in partial fulfillment of the requirements for the PhD in Chemistry from the California Institute of Technology. Arthur Amos Noyes Laboratory of Chemical Physics, Contribution No. 5753.
Subject Keywords:EXCITATION, ELECTRON–MOLECULE COLLISIONS, URANIUM HEXAFLUORIDE, TUNGSTEN FLUORIDES, EV RANGE 10–100, CHARGE EXCHANGE
Record Number:CaltechAUTHORS:RIAjcp79
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:RIAjcp79
Alternative URL:http://dx.doi.org/10.1063/1.437522
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10687
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:04 Jun 2008
Last Modified:26 Dec 2012 10:03

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