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Updated: Aug 17, 2026

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
Absolute differential cross sections for photo double ionization of helium from the Ab initio hyperspherical R-matrix
1Laboratoire de Spectroscopie Atomique et Ionique (UMR8624 du CNRS), Universite Paris-Sud, Batiment 350, 91405 Orsay Cedex, France.
Abstract:
The hyperspherical R-matrix method with semiclassical outgoing waves introduced by us previously [Phys. Rev. A 60, 3667 (1999)] is applied to the one-photon double ionization of the He atom. The absolute differential cross sections obtained are in excellent agreement with experiment for the very challenging dynamical situations considered. This method is the first one to compute the final double continuum state accurately over the entire configuration space, from the vicinity of the nucleus to the asymptotic region.
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