Abstract

A high-intensity short-pulse KrF laser system is used to produce fast recombining plasmas by ionization of preformed lithium fluorine plasma targets. Soft-x-ray emission from these plasmas is measured, and population inversions in hydrogenic lithium are observed as the plasma recombines. For relatively low-temperature target plasma columns a nonlinear increase in the intensity of the 2–1 transition in Li III (135 Å) is observed with respect to length.

© 1996 Optical Society of America

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