Frustration of direct photoionization of Ar clusters in intense extreme ultraviolet pulses from a free electron laser

被引：34

作者：

Iwayama, H. ^{[1
,2
]}

Nagaya, K. ^{[1
,2
]}

Yao, M. ^{[1
,2
]}

Fukuzawa, H. ^{[2
,3
]}

Liu, X-J ^{[2
,3
]}

Pruemper, G. ^{[2
,3
]}

Okunishi, M. ^{[3
]}

Shimada, K. ^{[3
]}

Ueda, K. ^{[2
,3
]}

Harada, T. ^{[3
]}

Toyoda, M. ^{[3
]}

Yanagihara, M. ^{[3
]}

Yamamoto, M. ^{[3
]}

Motomura, K. ^{[2
,4
]}

Saito, N. ^{[2
,4
]}

Rudenko, A. ^{[2
,5
]}

Ullrich, J. ^{[5
,6
]}

Foucar, L. ^{[7
]}

Czasch, A. ^{[7
]}

Doerner, R. ^{[7
]}

Nagasono, M. ^{[2
]}

Higashiya, A. ^{[2
]}

Yabashi, M. ^{[2
]}

Ishikawa, T. ^{[2
]}

Ohashi, H. ^{[2
,8
]}

Kimura, H. ^{[2
,8
]}

机构：

[1] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[2] XFEL Project Head Off, RIKEN, Mikazuki, Hyogo 6795148, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[4] AIST, Natl Metrol Inst Japan, Tsukuba, Ibaraki 3058568, Japan

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

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

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

[8] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2009年 / 42卷 / 13期

关键词：

MULTIPLE IONIZATION; ATOMIC CLUSTERS; RADIATION; FIELD;

D O I：

10.1088/0953-4075/42/13/134019

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have measured the kinetic energies of fragment ions from Ar clusters (average cluster size < N > similar to 10-600) exposed to intense extreme ultraviolet free electron laser pulses (lambda similar to 61 nm, I similar to 1.3 x 10(11) W cm(-2)). For small clusters (< N > less than or similar to 200), the average kinetic energy of ions strongly increases with increasing the cluster size, indicating a promotion of the multiple ionization, whereas the average kinetic energy is observed to be saturated for < N > greater than or similar to 200. Considering how many photoelectrons can escape from the cluster, it was found that the size dependence of the ion kinetic energy exhibited the frustration of direct photoionization, which resulted from the strong Coulomb potential of the highly ionized cluster.

引用

页数：5

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