Interatomic Coulombic Decay following Photoionization of the Helium Dimer: Observation of Vibrational Structure

被引：110

作者：

Havermeier, T. ^{[1
]}

Jahnke, T. ^{[1
]}

Kreidi, K. ^{[1
]}

Wallauer, R. ^{[1
]}

Voss, S. ^{[1
]}

Schoeffler, M. ^{[1
]}

Schoessler, S. ^{[1
]}

Foucar, L. ^{[1
]}

Neumann, N. ^{[1
]}

Titze, J. ^{[1
]}

Sann, H. ^{[1
]}

Kuehnel, M. ^{[1
]}

Voigtsberger, J. ^{[1
]}

Morilla, J. H. ^{[3
]}

Schoellkopf, W. ^{[2
]}

Schmidt-Boecking, H. ^{[1
]}

Grisenti, R. E. ^{[1
,4
]}

Doerner, R. ^{[1
]}

机构：

[1] Goethe Univ Frankfurt, Inst Kernphys, D-60438 Frankfurt, Germany

[2] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[3] CSIC, Inst Estructura Mat, E-28006 Madrid, Spain

[4] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 13期

关键词：

DER-WAALS CLUSTERS; MOMENTUM SPECTROSCOPY; BINDING-ENERGY; RECOIL-ION; NE DIMER; MOLECULES; DYNAMICS;

D O I：

10.1103/PhysRevLett.104.133401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using synchrotron radiation we simultaneously ionize and excite one helium atom of a helium dimer (He-2) in a shakeup process. The populated states of the dimer ion [i.e., He*+ (n = 2, 3) - He] are found to deexcite via interatomic Coulombic decay. This leads to the emission of a second electron from the neutral site and a subsequent Coulomb explosion. In this Letter we present a measurement of the momenta of fragments that are created during this reaction. The electron energy distribution and the kinetic energy release of the two He+ ions show pronounced oscillations which we attribute to the structure of the vibrational wave function of the dimer ion.

引用

页数：4

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