# CW DYE LASER EXCITATION SPECTROSCOPY: CaF $A^{2}\Pi - X^{2}\Sigma$

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 dc.creator Harris, David O. en_US dc.creator Field, R. W. en_US dc.creator Tanaka, Takehiko en_US dc.date.accessioned 2006-06-15T17:16:21Z dc.date.available 2006-06-15T17:16:21Z dc.date.issued 1974 en_US dc.identifier 1974-TG-5 en_US dc.identifier.uri http://hdl.handle.net/1811/16486 dc.description This work was supported, in part, by Grants AFOSR-73-2565 and NSF-GP-35672X. en_US dc.description Author Institution: Quantum Institute, University of California en_US dc.description.abstract Excitation spectra of the CaF $A^{2}\Pi - X^{2}\Sigma$(0,0), (1,1), and (1,0) bands have been observed and assigned. The rotational analysis of the CaF $A - X$ and $B - X$ bands by B. S. Mohanty and K. N. Upadhya [Ind. J. Pure Appl. Phys. 5, 523 (1967)] is shown to be incorrect. Because it is possible to make independent rotational assignments of each line in an excitation spectrum by observing frequency differences and relative intensities in photoluminescence spectra, tunable laser excitation spectroscopy promises much less ambiguity than traditional techniques for assignment of dense, badly overlapped spectra. The following spectroscopic constants (in $cm^{-1}$) are obtained for the CaF $A^{2}\Pi$ and $X^{2}\Sigma$ states. Numbers in parentheses correspond to three standard deviations uncertainty in the last digit. \def \a {\hphantom{$^{2}\Pi_{1/2}$}} [FIGURE] The origin of the $A^{2}\Pi_{1/2} - X^{2}\Sigma$ (1,1) subband lies 5.62(30) $cm^{-1}$ to the blue of the corresponding (0,0) subband origin. The (0,0) band $Q_{2}$ head is observed to form at J = 26 $\pm$ 0.5. The difference of the $A^{2}\Pi$ effective rotational constants is $2B^{2}/A$. The $A^{2}\Pi$ lamba doubling constant, p, agrees well with the pure precession estimate of the interaction between the $A^{2}\Pi$ and $B^{2}\Sigma$ states. en_US dc.format.extent 280921 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title CW DYE LASER EXCITATION SPECTROSCOPY: CaF $A^{2}\Pi - X^{2}\Sigma$ en_US dc.type article en_US