Europhys. Lett.
Volume 76, Number 5, December 2006
Page(s) 815 - 821
Section Atomic and molecular physics
Published online 08 November 2006
Europhys. Lett., 76 (5), pp. 815-821 (2006)
DOI: 10.1209/epl/i2006-10362-7

Charge-exchange-driven X-ray emission from highly ionized plasma jets

F. 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