Fast electrons from multi-electron dynamics in xenon clusters induced by inner-shell ionization

被引：51

作者：

Bostedt, Christoph ^{[2
]}

Thomas, Heiko ^{[2
]}

Hoener, Matthias ^{[2
]}

Moeller, Thomas ^{[2
]}

Saalmann, Ulf ^{[1
,3
]}

Georgescu, Ionut ^{[1
]}

Gnodtke, Christian ^{[1
]}

Rost, Jan-Michael ^{[1
,3
]}

机构：

[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[2] Tech Univ Berlin, Inst Opt & Atomare Phys, D-10623 Berlin, Germany

[3] Ctr Free Electron Laser Sci, Max Planck Adv Study Grp, D-22761 Hamburg, Germany

来源：

NEW JOURNAL OF PHYSICS | 2010年 / 12卷

关键词：

LASER; SCATTERING;

D O I：

10.1088/1367-2630/12/8/083004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Fast electrons emitted from xenon clusters in strong femtosecond 90 eV pulses have been measured at the Free-electron Laser in Hamburg (FLASH). Energy absorption occurs mainly through atomic inner-shell photo-ionization. Photo-electrons are trapped in the strong Coulomb potential of the cluster ions and form a non-equilibrium plasma with supra-atomic density. Its equilibration through multiple energy-exchanging collisions within the entire cluster volume produces electrons with energies well beyond the dominant emission line of atomic xenon. Here, in contrast to traditional low-frequency laser plasma heating, the plasma gains energy from electrons delivered through massive single-photon excitation from bound states. Electron emission induced by thermalization of a non-equilibrium plasma is expected to be a general phenomenon occurring for strong atomic x-ray absorption in extended systems.

引用

页数：9

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