Ionization of helium, neon and xenon by positron impact

被引：24

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 / 22期

关键词：

D O I：

10.1088/0953-4075/32/22/302

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Single ionization of xenon and double ionization of helium, neon and xenon by positron impact have been studied at energies from threshold to similar to 1 keV. The total single ionization cross section of xenon is seen to behave as expected. In particular, single ionization with positronium formation is a strong channel at low energies. For double ionization we found that positronium formation is strongly suppressed and makes no contribution to the total cross section in the light noble gases, while some evidence for this channel is observed in xenon.

引用

页码：5237 / 5245

页数：9

共 12 条

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