# ABSORPTION SPECTRUM OF CF, 1500-2500{\AA}.

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 Title: ABSORPTION SPECTRUM OF CF, 1500-2500{\AA}. Creators: White, William P.; Mathews, C. W. Issue Date: 1969 Publisher: Ohio State University Abstract: Observation of the CF spectrum in absorption has permitted us to extend the analyses of previously observed A and B $states^{1,2}$ and to obtain preliminary assignments for a new series of bands observed between 1500 and $1950{\AA}$. Rotational analysis of the (2,0) band of the $A ^{2}\Sigma^{+} - X ^{2}II$ system confirms an earlier vibrational $assignment^{3}$ and provides additional information about the predissociation of the $A ^{2}\Sigma^{+}$ state. Our observations of the B-X system supplements earlier unpublished $results^{4}$ and establishes the identity of the upper state as $^{2}\Delta$ (case b). A summary will be presented of our present interpretation of the bands below $1950{\AA}$. These bands are characterized by upper state B values comparable to those of the $A ^{2}\Sigma^{+}$ state and by evidence of predissociation or perturbation. Description: Grateful acknowledgment is made to Dr. A. E. Douglas and his associates at the Division of Pure Physics, National Research Council, Ottawa, Canada for the use of their equipment in obtaining the data and to the donors of The Petroleum Research Fund, administered by the American Chemical Society, for partial support during the analysis of the data. $^{1}$ E. B. Andrews and R. F. Barrow, Proc. Phys. Soc. London A64, 481 (1951). $^{2}$ T. L. Porter, D. E. Mann and N. Acquista, J. Mol. Spectry, 16, 228 (1965). $^{3}$ B. A. Thrush and J. J. Zwolenik, Trans, Faraday Soc. 59, 582 (1963). $^{4}$ P. K. Carroll and R. D. Verma, private communication. Author Institution: Department of Chemistry, The Ohio State University URI: http://hdl.handle.net/1811/15831 Other Identifiers: 1969-S-4