Volume 76, Number 5, December 2006
|Page(s)||815 - 821|
|Section||Atomic and molecular physics|
|Published online||08 November 2006|
Charge-exchange-driven X-ray emission from highly ionized plasma jets
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
Accepted: 12 October 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.
PACS: 32.70.Fw – Absolute and relative intensities / 32.30.Rj – X-ray spectra / 34.70.+e – Charge transfer
© EDP Sciences, 2006
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