(e,3e) on helium at low impact energy:: The strongly correlated three-electron continuum

被引：49
作者：
Duerr, M.
Dorn, A.
Ullrich, J.
Cao, S. P.
Czasch, A.
Kheifets, A. S.
Goetz, J. R.
Briggs, J. S.
机构：
[1] Max Planck Inst Nucl Phys, D-69117 Heidelberg, Germany
[2] Chinese Acad Sci, Grad Univ, Inst Modern Phys, Lanzhou 730000, Peoples R China
[3] Goethe Univ Frankfurt, Inst Kernphys, D-60438 Frankfurt, Germany
[4] Australian Natl Univ, Canberra, ACT 0200, Australia
[5] Univ Freiburg, D-79104 Freiburg, Germany
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 19期
关键词：
D O I：
10.1103/PhysRevLett.98.193201
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Double ionization of the helium atom by slow electron impact (E-0=106 eV) is studied in a kinematically complete experiment. Because of a low excess energy E-exc=27 eV above the double ionization threshold, a strongly correlated three-electron continuum is realized. This is demonstrated by measuring and calculating the fully differential cross sections for equal energy sharing of the final-state electrons. While the electron emission is dominated by a strong Coulomb repulsion, also signatures of more complex dynamics of the full four-body system are identified.
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页数：4
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