Belenger, Christiane
[UCL]
Defrance, Pierre
[UCL]
Salzborn, E.
[UCL]
Shevelko, V.P.
Tawara, H.
Uskov, D.B.
New experimental data on double-ionization cross sections of neutral atoms, positive and negative ions by electron impact are reported. These and other relevant data are compared with recent multiple-ionization semiempirical formulae extended for the case of two-electron ionization. Theory gives analytical dependence of the double-ionization cross sections on the main parameters of the collision system in a wide energy range. Far the He atom, He-like ions and H- ion high-energy asymptotic behaviour of the double-ionization cross sections are considered on the basis of a quantum mechanical treatment. Suggested cross section scaling for fast collisions, employing a target-effective nuclear charge, is in good agreement with experimental data.
Bibliographic reference |
Belenger, Christiane ; Defrance, Pierre ; Salzborn, E. ; Shevelko, V.P. ; Tawara, H. ; et. al. Double ionization of neutral atoms, positive and negative ions by electron impact. In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 30, no. 11, p. 2667-2679 (1997) |
Permanent URL |
http://hdl.handle.net/2078.1/46206 |