Open AccessInfluence of screening effect on double differential cross section and single differential cross section for (e, 2e) process of helium
Author(s) -
杨欢,
邢玲玲,
张穗萌,
吴兴举,
袁好
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.183402
Subject(s) - helium , ionization , atomic physics , cross section (physics) , electron ionization , scattering cross section , physics , nuclear cross section , differential (mechanical device) , electron , nuclear physics , ion , scattering , optics , elastic scattering , quantum mechanics , thermodynamics
The double differential cross sections for electron impact single ionization of helium at incident energies of 32.5, 36.5 and 40.7 eV are calculated by using the DS3C model. The calculated results are compared with the experimental date. The exchange effects are discussed. The single differential cross section for electron impact single ionization of helium is obtained by integrating the double differential cross sections over the angle of the ejected electron. The single differential cross sections of helium at incident energies of 32.5, 36.5, 40.7 and 50 eV are calculated by using the 3C model and the DS3C model. The calculated results are compared with the experimental date. The structure of the cross section is analysed and the contribution of exchange effect to the corss section is discussed.