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Results of an experiment on the interaction of laser-produced plasma with a pulsed gas jet are reported. A resonant charge-exchange pumping of the n=3 level of the C3+ ion was observed. A spatial structure of the region of intensive interaction was obtained by a short time imaging of filtered plasma radiation. According to independent probe measurements, the interaction was realized at densities of ions and gas particles in excess of 1016 cm-3. The obtained data provide a prospect for future experiments on laser gain in the EUV spectral range based on charge-exchange pumping of the C5+ ion. [ABSTRACT FROM AUTHOR]

Short pulse laser generated plasmas interacting with a pulsed gas jet are studied to aid the realization of novel XUV laser schemes based on recombination supported by charge exchange pumping. Interaction of C4+, O3+ and O4+ ions with hydrogen and nitrogen indicates strong charge exchange pumping of C3+(3p-2s, 3d-2p) lines at 31.2 and 38.4 nm, and O2+ (2p 3s-2p2) and O3+ (2s 3d-2s22p) lines at 37.4 and 23.8 nm. [ABSTRACT FROM AUTHOR]