NONDISSOCIATIVE SINGLE IONIZATION OF MOLECULAR-HYDROGEN BY ELECTRON AND POSITRON-IMPACT

被引：30

作者：

JACOBSEN, FM ^{[1
]}

FRANDSEN, NP ^{[1
]}

KNUDSEN, H ^{[1
]}

MIKKELSEN, U ^{[1
]}

机构：

[1] AARHUS UNIV, INST PHYS & ASTRON, DK-8000 AARHUS, DENMARK

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1995年 / 28卷 / 21期

关键词：

D O I：

10.1088/0953-4075/28/21/015

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present experimental results for impact ionization of molecular hydrogen by electrons and positrons for the range of impact energies from threshold to about 2 keV (0.4-2 keV for e(-)). Our electron data agree with the most recent ones measured by others. When we compare our positron results to earlier published single ionization cross sections we find significant differences for impact energies from threshold to about 100 eV with the new cross sections being substantially smaller. In the present study an effort has been made to discriminate against false signals caused by positronium formation and other effects.

引用

页码：4675 / 4689

页数：15

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