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

被引：60

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.

引用

页数：4

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