Electron-impact excitation of helium: Cross sections,n, andldistributions of high Rydberg states

1977 ◽  
Vol 16 (1) ◽  
pp. 48-61 ◽  
Author(s):  
James A. Schiavone ◽  
David E. Donohue ◽  
David R. Herrick ◽  
Robert S. Freund
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Rydberg States ◽  
Impact Excitation ◽  
Electron Impact Excitation

Electron-impact excitation cross sections of vibrationally excitedX1Σg+ H2andD2molecules to Rydberg states

1999 ◽  
Vol 60 (3) ◽  
pp. 2091-2103 ◽  
Author(s):  
R. Celiberto ◽  
A. Laricchiuta ◽  
U. T. Lamanna ◽  
R. K. Janev ◽  
M. Capitelli
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Rydberg States ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Excitation Cross Sections

Integral cross sections for electron-impact excitation of the 33S and 31S states of He near threshold

2006 ◽  
Vol 39 (6) ◽  
pp. 1547-1561 ◽  
Author(s):  
M Stepanović ◽  
M Minić ◽  
D Cvejanović ◽  
J Jureta ◽  
J Kurepa ◽  
...  
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Near Threshold

Benchmark cross sections for electron-impact excitation ofn S1levels of He

1980 ◽  
Vol 22 (5) ◽  
pp. 1916-1929 ◽  
Author(s):  
B. Van Zyl ◽  
G. H. Dunn ◽  
G. Chamberlain ◽  
D. W. O. Heddle
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Impact Excitation ◽  
Electron Impact Excitation

Electron impact excitation of positive ions

1970 ◽  
Vol 266 (1175) ◽  
pp. 225-279 ◽  
Keyword(s):  
Electron Impact ◽  
Cross Sections ◽  
Nuclear Charge ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Positive Ions ◽  
Relativistic Coulomb ◽  
Hydrogenic Ions

Non-relativistic Coulomb-Born-Oppenheimer reactance matrices and cross-sections are given for all transitions between the Is, 2s and 2p states in He+ and in hydrogen-like ions of large nuclear charge. From these results some cross-sections for intercombination transitions in highly charged non-hydrogenic ions are estimated.

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.

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