| Autor: |
Markus Schöffler, Reinhard Dörner, Artem Rudenko, Yuhai Jiang, Th. Weber, Daniel Fischer, T. Ferger, Th. Ergler, Theo J. M. Zouros, S. Düsterer, Robert Moshammer, Claus Dieter Schröter, K. Zrost, Kai Uwe Kuhnel, Alexander Dorn, J. Titze, Elke Plonjes, S. Ludemann, Till Jahnke, Joachim Ullrich, R. Treusch, Paul Radcliffe, Lutz Foucar |
| Jazyk: |
angličtina |
| Rok vydání: |
2007 |
| Předmět: |
|
| Zdroj: |
Physical review letters 98, 203001 (2007). doi:10.1103/PhysRevLett.98.203001 |
| DOI: |
10.1103/PhysRevLett.98.203001 |
| Popis: |
Few-photon multiple ionization of Ne and Ar atoms by strong vacuum ultraviolet laser pulses from the free-electron laser at Hamburg was investigated differentially with the Heidelberg reaction microscope. The light-intensity dependence of ${\mathrm{Ne}}^{2+}$ production reveals the dominance of nonsequential two-photon double ionization at intensities of $Il6\ifmmode\times\else\texttimes\fi{}{10}^{12}\text{ }\text{ }\mathrm{W}/{\mathrm{cm}}^{2}$ and significant contributions of three-photon ionization as $I$ increases. ${\mathrm{Ne}}^{2+}$ recoil-ion-momentum distributions suggest that two electrons absorbing ``instantaneously'' two photons are ejected most likely into opposite hemispheres with similar energies. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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