The optical signatures for the processes Na3+ Cl,Br.l  Na2*+NaX(X= Cl,Br,l) emcompass emission from a limited number of Na2 band systems. Surprisingly, the observed emission is characterized by sharp well-defined emission regions (Fig. 1) superimposed on a much weaker but perceptible background.1 These sharp emission features are not readily explained by invoking a purely fluorescent process.2 Their correlation in certain regions to the emission characteristic of optically pumped Na2 laser systems suggested the possibility that stimulated emission analogous to that obtained in alkali dimer optical pumping experiments3 might be associated with certain Na2 emission products.

© 1989 Optical Society of America

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