Charge-exchange-driven X-ray emission from highly ionized plasma jetsF. B. Rosmej1, V. S. Lisitsa2, R. Schott3, 4, E. Dalimier3, 4, D. Riley5, A. Delserieys5, O. Renner6 and E. Krousky6
1 Université de Provence et CNRS, UMR 6633, Centre de St-Jérôme, PIIM F-13397 Marseille Cedex 20, France
2 Russian Research Center Kurchatov - 123182 Moscow, Russia
3 Université de Paris VI - Paris, France
4 LULI - Palaiseau, France
5 Queens University - Belfast, BT7 1NN, UK
6 Institute of Physics - Prague, Czech Repulic
received 5 July 2006; accepted in final form 12 October 2006
published online 8 November 2006
The interaction of highly ionized laser-produced plasma jets with gases has been studied with X-ray microscopic methods. Simultaneous high spectral and 2-dimensional spatial resolution provided a detailed topological structure of the counter-propagating plasma and discovered a gas pressure-dependent X-ray emission structure inside the jets of H-like and He-like aluminum ions. At larger distances from the target, anomalous high (3 orders of magnitude) intensities of Li-like intercombination transitions from double excited states have been identified. Charge-exchange-driven cascading in autoionizing states is proposed to explain the experimental findings.
32.70.Fw - Absolute and relative intensities.
32.30.Rj - X-ray spectra.
34.70.+e - Charge transfer.
© EDP Sciences 2006