Experimental investigation of transfer ionization mechanism in slow He2+ -He collisions

被引：3

作者：

Zhu Xiao-Long ^{[1
,2
]}

Ma Xin-Wen ^{[1
,2
]}

Li Bin ^{[1
,2
]}

Feng Wen-Tian ^{[1
,2
]}

Zhang Shao-Feng ^{[1
,2
]}

Liu Hui-Ping ^{[1
]}

Qian Dong-Bin ^{[1
,2
]}

Zhang Da-Cheng ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

来源：

ACTA PHYSICA SINICA | 2010年 / 59卷 / 01期

关键词：

COLTRIMS; transfer ionization mechanism; ion-atom collision; CAPTURE CROSS-SECTIONS; ELECTRON-CAPTURE; CHARGE-TRANSFER; ION; SCATTERING; DYNAMICS;

D O I：

10.7498/aps.59.620

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The processes of transfer ionization in He2+ -He collisions at energies ranging from 20 to 40 keV have been studied experimentally by means of cold target recoil ions momentum spectroscopy. From the longitudinal momentum spectra of recoil ions, different mechanisms of transfer ionization have been obtained. The results show that one of the electrons of helium atom being captured into the ground state of projectile ion He2+ and the other one emitted to the continuum state of projectile or target are the dominant mechanisms of transfer ionization. The autoionization cross section of projectile after two-electron capture into a double excited state is small. Transfer ionization for one target electron capture into ground state and the other one into the continuum of projectile mainly occurs at large impact parameter collisions.

引用

页码：620 / 624

页数：5

共 22 条

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