UV ARGON LASER EXCITED FLUORESCENCE OF ALKALINE EARTH OXIDES AND SULFIDES
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Date
1978
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Ohio State University
Abstract
A cw $Ar^{+}$ laser divides 3 Watts of power among six UV lines ranging from 3336.14-3637.86 \AA, five of which excite analyzable fluorescence from CaO, SrO, CaS, SrS, and BaS. The sulfides are generated by reacting the metal entrained in argon with OCS. Observed excitations and fluorescence progressions are summarized on the next page. [FIGURE] New electronic states are designated by an asterisk. Fluorescence from BaO is also observed but too weak to assign. Four new electronic states are observed and vibrational numberings are determined or corrected for five states by comparing observed transition intensities against calculated Franck-Condon factors. Numerous perturbations are observed and intensity anomalies are more rule than exception, A detailed analysis of the BaS $A^{1}\Sigma \sim a^{3}\Pi$ and $A^{1}\Sigma \sim A^{\prime} \Pi$ perturbations combining the present laser fluorescence observations with the B-X and A-X $absorption^{1}$ will be discussed.
Description
$^{1}$ R. F. Barrow, W. G. Burton, and F. A. Jones, Trans, Farad. Soc. 67, 902 (1971); and R. F. Barrow, private communication. Present address of Ingermar Renhorn: Institute of Physics, University of Stockholm, Vanadisv. 9, 111346 Stockholm, Sweden. Present address of P. G, Cummins: Unilever Research Port Sunlight, The Wirral, England.""
Author Institution: Spectroscopy Laboratory and Department of Chemistry, Massachusetts Institute of Technology
Author Institution: Spectroscopy Laboratory and Department of Chemistry, Massachusetts Institute of Technology