ONE AND 2 ELECTRON PROCESSES IN FAST COLLISIONS BETWEEN PROTONS AND HYDROGEN MOLECULES

被引：8

作者：

BENITZHAK, I ^{[1
]}

KRISHNAMURTHI, V ^{[1
]}

CARNES, KD ^{[1
]}

ALIABADI, H ^{[1
]}

KNUDSEN, H ^{[1
]}

MIKKELSEN, U ^{[1
]}

机构：

[1] UNIV AARHUS,INST PHYS & ASTRON,DK-8200 AARHUS,DENMARK

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1995年 / 99卷 / 1-4期

关键词：

D O I：

10.1016/0168-583X(94)00665-2

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The ratio of double to single ionization of hydrogen molecules caused by fast proton impact was measured over a wide velocity range (nu = 6-24 a.u.) using the coincidence time-of-flight technique. This ratio, similar to 0.13% at high velocities, is about a factor of 2 smaller than the same ratio for the He target. This difference is due mainly to the larger single ionization cross section for hydrogen molecules, i.e. sigma(+)(H-2)similar to 2 sigma(+)(He). The double ionization cross section, on the other hand, is similar for both He and Hz. Furthermore, the ratio of double to single ionization of the hydrogen molecule by proton impact is smaller than the one caused by electron impact at the same velocity in a similar way as for the helium target.

引用

页码：104 / 106

页数：3

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