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Differential And Total Cross Sections For Ionization Of Helium And Hydrogen By Electrons, M. Eugene Rudd
Differential And Total Cross Sections For Ionization Of Helium And Hydrogen By Electrons, M. Eugene Rudd
M. Eugene Rudd Publications
A comprehensive semiempirical model for singly and doubly differential and total ionization cross sections for electron production by electron impact is presented. The model is discussed in relation to several theoretically required constraints. Available experimental data for hydrogen and helium targets are examined, and recommended values of the data are given for all ranges of primary and secondary energies and angles of ejection.
Recoil Ions From Near-Zero-Impact-Parameter H+-Xe Collisions In The Range 20- 70 Kev, Wen-Qin Cheng, M. Eugene Rudd
Recoil Ions From Near-Zero-Impact-Parameter H+-Xe Collisions In The Range 20- 70 Kev, Wen-Qin Cheng, M. Eugene Rudd
M. Eugene Rudd Publications
Recoil ions from very small impact-parameter collisions of 20-70-keV protons with xenon atoms were selected by viewing only those ejected at 50° and 70° from the beam direction. These ions were charge-state analyzed and the cross sections determined for the production of charge states up to 6+. In such collisions, multiple ionization accounts for 60-80% of the ionizing collisions and 80-90 % of the total ionization.