Ionization of argon and krypton by positron impact

被引：28

作者：

Bluhme, H ^{[1
]}

Knudsen, H ^{[1
]}

Merrison, JP ^{[1
]}

Nielsen, KA ^{[1
]}

机构：

[1] Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1999年 / 32卷 / 24期

关键词：

D O I：

10.1088/0953-4075/32/24/317

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Total single and double ionization cross sections for argon and krypton by positron impact have been measured for projectile energies ranging from threshold to similar to 1 keV. The single ionization cross sections are seen to behave as expected, showing large contributions from positronium formation at low energies. In the double ionization cross sections there seems to be a lack of positronium formation at threshold, while a clear contribution from the process is seen at intermediate energies.

引用

页码：5835 / 5842

页数：8

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