IONIZATION OF HELIUM AND MOLECULAR-HYDROGEN BY SLOW ANTIPROTONS

被引：138

作者：

HVELPLUND, P

KNUDSEN, H

MIKKELSEN, U

MORENZONI, E

MOLLER, SP

UGGERHOJ, E

WORM, T

机构：

[1] PSI,CH-5234 VILLIGEN,SWITZERLAND

[2] AARHUS UNIV,INST SYNCHROTRON RADIAT,DK-8000 AARHUS,DENMARK

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1994年 / 27卷 / 05期

关键词：

D O I：

10.1088/0953-4075/27/5/012

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Measurements of the cross sections for single and double ionization of helium as well as for the creation of H-2 and H+ ions from H-2 for impact of antiprotons in the energy range 13-500 keV are presented. The results are compared with our earlier, less accurate data and with data for equivelocity proton impact. The single ionization cross section of helium agrees remarkably well with a continuum distorted wave (CDW EIS) calculation. The ratio between the double and the single ionization cross sections of helium increases dramatically with decreasing projectile energy. New theoretical calculations are called for.

引用

页码：925 / 934

页数：10

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