Recoil-ion momentum distributions for two-photon double ionization of He and Ne by 44 eV free-electron laser radiation

被引：130

作者：

Rudenko, A. ^{[1
,2
]}

Foucar, L. ^{[3
]}

Kurka, M. ^{[2
]}

Ergler, Th. ^{[2
]}

Kuehnel, K. U. ^{[2
]}

Jiang, Y. H. ^{[2
]}

Voitkiv, A. ^{[2
]}

Najjari, B. ^{[2
]}

Kheifets, A. ^{[4
]}

Luedemann, S. ^{[2
]}

Havermeier, T. ^{[3
]}

Smolarski, M. ^{[3
]}

Schoessler, S. ^{[3
]}

Cole, K. ^{[3
]}

Schoeffler, M. ^{[3
]}

Doerner, R. ^{[3
]}

Duesterer, S. ^{[5
]}

Li, W. ^{[5
]}

Keitel, B. ^{[5
]}

Treusch, R. ^{[5
]}

Gensch, M. ^{[5
]}

Schroeter, C. D. ^{[2
]}

Moshammer, R. ^{[1
,2
]}

Ullrich, J. ^{[1
,2
]}

机构：

[1] CFEL, Max Planck Adv Study Grp, D-22607 Hamburg, Germany

[2] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[3] Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany

[4] Australian Natl Univ, Res Sch Phys Sci, Canberra, ACT 0200, Australia

[5] DESY, D-22607 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.101.073003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recoil-ion momentum distributions for two-photon double ionization of He and Ne (h omega=44 eV) have been recorded with a reaction microscope at FLASH (the free-electron laser at Hamburg) at an intensity of similar to 1x10(14) W/cm(2) exploring the dynamics of the two fundamental two-photon-two-electron reaction pathways, namely, sequential and direct (or nonsequential) absorption of the photons. We find strong differences in the recoil-ion momentum patterns for the two mechanisms pointing to the significantly different two-electron emission dynamics and thus provide serious constraints for theoretical models.

引用

页数：4

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