Phys. Rev. A 78, 012701 (2008) [7 pages]Signature of Ericson fluctuations in helium inelastic scattering cross sections near the double ionization thresholdReceived 26 February 2008; published 1 July 2008 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. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.78.012701
DOI:
10.1103/PhysRevA.78.012701
PACS:
34.80.Dp, 31.10.+z, 31.15.ag, 31.15.xj
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