Description: Three possibilities for making Li/sup -/ ions have been considered: electron capture in a suitable gas or vapor, extraction from a lithium plasma, and production on a low work function surface in a plasma. The only quantitative results, so far, have been for electron capture, with the highest yield being about 5% for Li/sup +/ in Cs vapor at 5 keV. Of the other two methods, Leung has seen some Li/sup -/ produced in the volume of a plasma, and we now report the observation of Li/sup -/ from a surface in a He-Li plasma.
Date: October 1, 1984
Creator: Stearns, J.W. & Pyle, R.V.
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