LASER INDUCED EXCITATION OF $Na_{2}O$
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Date
1980
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Ohio State University
Abstract
An argon laser $(\lambda = 4880$ and 5145 {\AA}) has been used to excite fluorescence from $Na_{2}O$. The spectra extend from 4500 to 8500 {\AA}. In a typical spectrum one observes what appear to be two band systems, the stronger of which is localized around the laser line. A weaker system extends from 6500 to 8500 {\AA}. Recently Grow and $pitzer^{1}$ have performed calculations to determine the structure and spectra associated with $Li_{2}O$. There is an outstanding correlation between the current work and this study. On the basis of this correlation, it would appear that the laser pump correspond to the excitation \[Na_{2} 0 \tilde{X} ^{1}\Sigma g^{+}\stackrel{h\nu}{\rightarrow} Na_{2}O^{*}\ ^{1}\Sigma_{u} \] with subsequent emission to both the ground $\tilde{X} ^{1}\Sigma^{+}$ and a very low-lying $^\Pi_{g}$ excited state \[Na_{2}0^{*}\ ^{1}\Sigma_{u_{\searrow}Na_{2}0^{*} \tilde{B}^{1}+h\nu^{\prime}} \rightarrow Na_{2}0 \tilde{X} ^{1}\Sigma_{g}^{+} h\nu\\ Na_{2}0^{*} \tilde{B} 1 + h\nu^{\prime}\] The analysis of the observed spectral features will be discussed.
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$^{1}$ D. T. Grow and R. M. Pitzer, J. Chem. Phys. 67, 4019 (1977).
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