Improved C-R model calculations for X-UV lasers by Li-like ions

Summary Form only given, as follows. The production of lithiumlike ions in a plasma produced by focusing a high-power laser on a solid target made of a chemical element with an atomic number below, say, 25 is abundant during the cooling phase of the plasma. This is due to the capture of free-electrons by He-like ions. The radiative electron capture populates preferentially the low-lying levels of Li-like ions, whereas the collisional (three-body) recombination populates preferentially the highly excited Rydberg levels. Radiative and/or collisionally induced transitions between all the levels occur continuously. In this complex process, transient population inversions appear between the n=3, n=4, and n=5 levels of Li-like ions. The population densities of the different ionic levels in the plasma have been estimated using a time-dependent collisional-radiative (C-R) model coupled with a simulation of the plasma hydrodynamics.<>