Double ionization of ground-state helium by the Compton scattering of a photon is calculated using the well-known product of three Coulomb waves (3C) wave function for the final double-continuum state of the atom and the Pluvinage wave function for the initial ground state (also a product of three Coulomb waves). The theoretical model fails to predict both the shape and the overall magnitude of the observed integrated cross section vs. Incident-photon energy. However, when the monopole part of the electron-photon interaction is removed by an ad hoc procedure, qualitative agreement is obtained, although the absolute size of the cross section is still almost an order of magnitude too large.
S. Jones et al., "Three-Coulomb-Wave Pluvinage Model for Compton Double Ionization of Helium in the Region of the Cross-Section Maximum," Physical Review A, American Physical Society (APS), Jul 2005.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevA.72.012718
Keywords and Phrases
Coulomb Waves; Double-Continuum State; Ground-State Helium
Article - Journal
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