ELECTRIC-DIPOLE MOMENTS OF H(N = 2) INDUCED IN H+-HE AND H-HE COLLISIONS

被引：18

作者：

HIPPLER, R ^{[1
]}

PLOTZKE, O ^{[1
]}

HARBICH, W ^{[1
]}

MADEHEIM, H ^{[1
]}

KLEINPOPPEN, H ^{[1
]}

LUTZ, HO ^{[1
]}

机构：

[1] UNIV STIRLING, ATOM PHYS LAB, STIRLING FK9 4LA, SCOTLAND

来源：

PHYSICAL REVIEW A | 1991年 / 43卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.43.2587

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Electric dipole moments of H(n = 2) induced by H+-He and H-He collisions are investigated at incident energies of 5-25 keV. For these collision systems, an energy-dependent forward-backward asymmetry (dipole moment) of the emitted Lyman-alpha radiation as a function of an external electric field is observed. In H+-He collisions, the measured dipole moment is positive, corresponding to an electron trailing behind the proton. The same analysis applied to the H-He system shows the electron riding in front of the proton. The observed differences between H and H+ impact are partly explained with the help of a simple model which assumes different cross sections for excitation into the different Stark states.

引用

页码：2587 / 2590

页数：4

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