Ultrafast Extreme Ultraviolet Induced Isomerization of Acetylene Cations

被引：175

作者：

Jiang, Y. H. ^{[1
]}

Rudenko, A. ^{[2
]}

Herrwerth, O. ^{[3
]}

Foucar, L. ^{[2
]}

Kurka, M. ^{[1
]}

Kuehnel, K. U. ^{[1
]}

Lezius, M. ^{[3
]}

Kling, M. F. ^{[3
]}

van Tilborg, J. ^{[4
]}

Belkacem, A. ^{[4
]}

Ueda, K. ^{[5
]}

Duesterer, S. ^{[6
]}

Treusch, R. ^{[6
]}

Schroeter, C. D. ^{[1
]}

Moshammer, R. ^{[1
]}

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

机构：

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

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

[3] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

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

[6] DESY, D-22607 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 26期

关键词：

FREE-ELECTRON LASER; MOLECULAR-IONS; PHOTOIONIZATION; DISSOCIATION; SPECTROSCOPY; VINYLIDENE; DYNAMICS; DICATION; ENERGY; STATES;

D O I：

10.1103/PhysRevLett.105.263002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ultrafast isomerization of acetylene cations (inverted right perpendicular HC = CH inverted left perpendicular(+)) in the low-lying excited A(2)Sigma(+)(g) state, populated by the absorption of extreme ultraviolet (XUV) photons (38 eV), has been observed at the Free Electron Laser in Hamburg, (FLASH). Recording coincident fragments C(+) + CH(2)(+) as a function of time between XUV-pump and -probe pulses, generated by a split-mirror device, we find an isomerization time of 52 +/- 15 fs in a kinetic energy release (KER) window of 5.8 < KER < 8 eV, providing clear evidence for the existence of a fast, nonradiative decay channel.

引用

页数：4

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