SINGLE IONIZATION OF HELIUM BY 40-3000-KEV ANTIPROTONS

被引：80
作者：
ANDERSEN, LH
HVELPLUND, P
KNUDSEN, H
MOLLER, SP
PEDERSEN, JOP
TANGPETERSEN, S
UGGERHOJ, E
ELSENER, K
MORENZONI, E
机构：
[1] CERN, CH-1211 GENEVA, SWITZERLAND
[2] PSI, CH-5234 VILLIGEN, SWITZERLAND
来源：
PHYSICAL REVIEW A | 1990年 / 41卷 / 11期
关键词：
D O I：
10.1103/PhysRevA.41.6536
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Measurements of single-ionization cross sections for antiproton impact on helium atoms are reported for impact energies ranging from 40 keV to 3 MeV. It is found that the measured cross sections are in good agreement with recent theoretical estimates based on the continuum-distorted-wave approximation. From a comparison with similar proton data, the ratio between antiproton and proton results is obtained. The energy dependence of this ratio is compared with various theoretical estimates and explained as a result of polarization and binding effects. © 1990 The American Physical Society.
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页码：6536 / 6539
页数：4
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