We calculated the inelastic electron impact excitation cross sections of He⁺ by electrons for a model helium atom to examine the onset of the signature of quantum chaotic scattering in this simple system. We find Ericson fluctuations (EF) in the calculated inelastic scattering cross sections only when the impact energies lie within about 0.21 eV below the double ionization threshold. We also discuss the stringent requirements and the proper methods for analyzing the inelastic scattering cross sections in order to observe EF experimentally.
J. Xu et al., "Signature of Ericson Fluctuations in Helium Inelastic Scattering Cross Sections Near the Double Ionization Threshold," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 78, no. 1, American Physical Society (APS), Jul 2008.
The definitive version is available at https://doi.org/10.1103/PhysRevA.78.012701
Keywords and Phrases
Atomic Physics; Chaotic Systems; Electric Excitation; Helium; Impact Ionization; Inelastic Scattering; Inert Gases; Ionization; Nuclear Physics; Radioactivity, American Physical Society (APS); Double Ionization (DI); Electron Impact Excitation; Ericson Fluctuations; Helium Atoms; Impact Energies; Quantum Chaotic Scattering; Scattering Cross Section (SCS); Simple Systems, Scattering
International Standard Serial Number (ISSN)
Article - Journal
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