Double ionization of helium by electron-impact:: Complete pictures of the four-body breakup dynamics

被引：103

作者：

Dorn, A

Kheifets, A

Schröter, CD

Najjari, B

Höhr, C

Moshammer, R

Ullrich, J

机构：

[1] Univ Freiburg, D-79104 Freiburg, Germany

[2] Australian Natl Univ, Res Sch Phys Sci & Engn, Canberra, ACT 0200, Australia

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

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.86.3755

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dynamics of He double ionization by 2 keV electron impact is studied experimentally for a momentum transfer of 0.6 a.u, at excess energies of 10 and 40 eV. Complete sets of fivefold differential cross sections are presented for all electron emission angles in coplanar geometry. Contributions beyond the first Born approximation are identified comparing experimental data with first order convergent close-coupling calculations which are in considerably better agreement with the present experiment than with the earlier measurement of Kheifets et al.

引用

收藏

页码：3755 / 3758

页数：4

相关论文

共 16 条

[1] Incremental approach to strongly correlated many-body finite systems [J].

Berakdar, J .

PHYSICAL REVIEW LETTERS, 2000, 85 (19) :4036-4039

[2] STRUCTURES IN THE CROSS-SECTION OF DOUBLE-IONIZATION OF HELIUM BY THE IMPACT OF FAST ELECTRONS [J].

BERAKDAR, J ;

KLAR, H .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1993, 26 (22) :4219-4235

[3] Differential cross sections for photo-double-ionization of the helium atom [J].

Briggs, JS ;

Schmidt, V .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2000, 33 (01) :R1-R48

[4] Double ionization of helium by fast electron impact [J].

Dorn, A ;

Moshammer, R ;

Schröter, CD ;

Zouros, TJM ;

Schmitt, W ;

Kollmus, H ;

Mann, R ;

Ullrich, J .

PHYSICAL REVIEW LETTERS, 1999, 82 (12) :2496-2499

[5] WANNIER THEORY FOR DOUBLE PHOTOIONIZATION OF NOBLE-GASES [J].

HUETZ, A ;

SELLES, P ;

WAYMEL, D ;

MAZEAU, J .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1991, 24 (08) :1917-1933

[6] A comparative experimental and theoretical investigation of the electron-impact double ionization of He in the keV regime [J].

Kheifets, A ;

Bray, I ;

Lahmam-Bennani, A ;

Duguet, A ;

Taouil, I .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1999, 32 (21) :5047-5065

[7] Calculation of circular dichroism in helium double photoionization [J].

Kheifets, AS ;

Bray, I .

PHYSICAL REVIEW LETTERS, 1998, 81 (21) :4588-4591

[8]

KHEIFETS AS, 1998, J PHYS B ATOM MOL PH, V31, P5149

[9] A high resolution 4 pi multi-electron spectrometer for soft electrons [J].

Kollmus, H ;

Schmitt, W ;

Moshammer, R ;

Unverzagt, M ;

Ullrich, J .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1997, 124 (2-3) :377-380

[10] Origin of dips and peaks in the absolute fully resolved cross sections for the electron-impact double ionization of He [J].

Lahmam-Bennani, A ;

Taouil, I ;

Duguet, A ;

Lecas, M ;

Avaldi, L ;

Berakdar, J .

PHYSICAL REVIEW A, 1999, 59 (05) :3548-3555