Projectile-charge sign dependence of four-particle dynamics in helium double ionization -: art. no. 243201

被引：53

作者：

Fischer, D

Moshammer, R

Dorn, A

López-Urrutia, JRC

Feuerstein, B

Höhr, C

Schröter, CD

Hagmann, S

Kollmus, H

Mann, R

Bapat, B

Ullrich, J

机构：

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

[2] Inst Kernphys, D-60486 Frankfurt, Germany

[3] Gesellschaft Schwerionenforsch, D-64220 Darmstadt, Germany

[4] Phys Res Lab, Ahmadabad 380009, Gujarat, India

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.90.243201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Double ionization of helium by 6 MeV proton impact has been explored in a kinematically complete experiment using a "reaction microscope." For the first time, fully differential cross sections for positively charged projectiles have been obtained and compared with data from 2 keV electron impact. The significant differences observed in the angular distribution of the ejected electrons are attributed to the charge sign of the projectile, resulting in different dynamics of the four-particle Coulomb system, which is not considered in the first Born approximation.

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页码：4 / 243201

页数：4

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