Open AccessELECTRON IMPACT IONIZATION CROSS SECTIONS OF BORON-LIKE IONS
Author(s) -
Dufei Fang,
Yansen Wang,
Wei Hu,
Gao Hai-Bin,
Feng Lu
Publication year - 1993
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.42.40
Subject(s) - born approximation , electron ionization , ionization , ion , random phase approximation , amplitude , atomic physics , coulomb , boron , electron , wave function , physics , interference (communication) , cross section (physics) , quantum mechanics , nuclear physics , channel (broadcasting) , electrical engineering , engineering
By using a distorted-wave Born exchange approximation, the direct ionizarion cross section of boron-like ions by electron impact have been calculated. The interferences between direct and exchange amplitudes make important contribution in the process of ionization. The calculated results indicate that the "Natural Phase" approximation is better than the "Maximum Interference" approximation, while the latter agrees better with experiments for some other species of ions. Compared with Coulomb-Born approximation of Moores et al., our calculation gives better agreement with the experiment data available.