Few-Photon Multiple Ionization of N2 by Extreme Ultraviolet Free-Electron Laser Radiation

被引：61
|
作者：
Jiang, Y. H. [1 ]
Rudenko, A. [2 ]
Kurka, M. [1 ]
Kuehnel, K. U. [1 ]
Ergler, Th. [1 ]
Foucar, L. [3 ]
Schoeffler, M. [3 ]
Schoessler, S. [3 ]
Havermeier, T. [3 ]
Smolarski, M. [3 ]
Cole, K. [3 ]
Doerner, R. [3 ]
Duesterer, S. [4 ]
Treusch, R. [4 ]
Gensch, M. [4 ]
Schroeter, C. D. [1 ]
Moshammer, R. [1 ]
Ullrich, J. [1 ]
机构：
[1] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany
[2] Max Planck Adv Study Grp, CFEL, D-22607 Hamburg, Germany
[3] Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany
[4] DESY, D-22607 Hamburg, Germany
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 12期
关键词：
ANGULAR-DISTRIBUTIONS; SHELL PHOTOIONIZATION; COULOMB EXPLOSION; DYNAMICS; NITROGEN; ION; SPECTROSCOPY; LOCALIZATION; N-2(2+); PULSES;
D O I：
10.1103/PhysRevLett.102.123002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Few-photon multiple ionization of N-2 was studied differentially in a reaction microscope using 44 eV, similar to 25 fs, intense (similar to 10(13) W/cm(2)) photon pulses from FLASH. Sequential ionization is observed to dominate. For various intermediate charge states N-2(n+) we find a considerable excess of photons absorbed compared to the minimum number that would energetically be required. Photoionization of aligned N-2(n+) ions, produced by photon absorption in sequential steps, is explored and few-photon absorption pathways are traced by inspecting kinetic energy releases and fragment-ion angular distributions.
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页数：4
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