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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