Excitation-Ionization of Helium to He+ (n = 2) at 365.8 eV
A second Born calculation of the (e, 2e) triple differential cross section for excitation-ionization of helium to He+(n = 2) in coplanar asymmetric geometry is found to be in excellent agreement with recent (relative) measurements of Rouvellou et al. The second Born cross section is very much larger, by about a factor of four, than the corresponding first Born cross section, a trend that is consistent with absolute total cross section measurements for ionization to He+ (2p) at the same impact energy.
P. J. Marchalant et al., "Excitation-Ionization of Helium to He+ (n = 2) at 365.8 eV," Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 33, no. 20, pp. L749-L754, Institute of Physics - IOP Publishing, Oct 2000.
The definitive version is available at http://dx.doi.org/10.1088/0953-4075/33/20/10e
Keywords and Phrases
Atomic physics; Electron energy levels; Ionization of gases; Kinetic energy; Coplanar asymmetric geometry; Helium
International Standard Serial Number (ISSN)
Article - Journal
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