Single Photon Double Ionization of the Helium Dimer

被引：35

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
]}

Malakzadeh, A. ^{[1
]}

Sisourat, N. ^{[2
]}

Schoellkopf, W. ^{[3
]}

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] Heidelberg Univ, Inst Phys Chem, D-69120 Heidelberg, Germany

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

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

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 15期

关键词：

DIFFERENTIAL CROSS-SECTIONS; ELECTRON-IMPACT IONIZATION; DOUBLE PHOTOIONIZATION; MOMENTUM SPECTROSCOPY; PERTURBATION-THEORY; RECOIL-ION; MOLECULES; ENERGY;

D O I：

10.1103/PhysRevLett.104.153401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that a single photon can ionize the two helium atoms of the helium dimer in a distance up to 10 angstrom. The energy sharing among the electrons, the angular distributions of the ions and electrons, as well as comparison with electron impact data for helium atoms suggest a knockoff type double ionization process. The Coulomb explosion imaging of He-2 provides a direct view of the nuclear wave function of this by far most extended and most diffuse of all naturally existing molecules.

引用

页数：4

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