Electron-impact double-ionization cross sections forXe8+

1989 ◽  
Vol 39 (5) ◽  
pp. 2381-2384 ◽  
Author(s):  
D. W. Mueller ◽  
L. J. Wang ◽  
D. C. Gregory
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Double Ionization ◽  
Ionization Cross ◽  
Ionization Cross Sections

scholarly journals Electron-impact double ionization of the carbon atom

2018 ◽  
Vol 620 ◽  
pp. A188 ◽  
Author(s):  
Valdas Jonauskas
Keyword(s):  
Carbon Atom ◽  
Electron Impact ◽  
Cross Sections ◽  
Double Ionization ◽  
Impact Excitation ◽  
Rate Coefficients ◽  
Electron Impact Excitation ◽  
Ionization Cross ◽  
Ionization Cross Sections ◽  
Good Agreement

Electron-impact single- and double-ionization cross sections and Maxwellian rate coefficients are presented for the carbon atom. Scaling factors are introduced for the electron-impact excitation and ionization cross sections obtained in the distorted wave (DW) approximation. It is shown that the scaled DW cross sections provide good agreement with measurements for the single ionization of the C atom and C1+ ion. The direct double-ionization (DDI) process is studied using a multi-step approach. Ionization–ionization, excitation–ionization–ionization, and ionization–excitation–ionization branches are analyzed. It is demonstrated that the three-step processes contribute ≼40% of the total DDI cross sections for the case where one of the electrons takes all of the excess energy after the first ionization process.

Electron Impact Double Ionization of Noble Gas Atoms

1972 ◽  
Vol 50 (23) ◽  
pp. 2961-2966 ◽  
Author(s):  
B. N. Roy ◽  
D. N. Tripathi ◽  
D. K. Rai
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Noble Gas ◽  
Double Ionization ◽  
Experimental Results ◽  
Ionization Cross ◽  
Proton Impact ◽  
Classical Expression ◽  
Ionization Cross Sections

Cross sections for double ionization by electron impact for noble gas atoms have been calculated using Gryzinski's classical expression. The effect of including ionization from the inner shell has been discussed in connection with possible Auger emission. Calculated cross sections have been compared with the available experimental results and also with calculated values of proton impact double ionization cross sections.

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