Equal energy-sharing double photoionization of helium from near-threshold to high energies - art. no. 065402

For a given excess energy E above the helium double photoionization (DPI) t hreshold, just two parameters are necessary to generate any angular set of the fully resolved triply differential cross sections (TDCS) in the case of the two outgoing electrons sharing E equally. It is shown that these param eters, the width and magnitude of the Gaussian ansatz, may be estimated ab initio from the convergent dose-coupling (CCC) theory. The CCC calculations have been performed for E in the range of 3-80 eV, allowing for the genera tion of equal energy-sharing TDCS at arbitrary orientation of the two elect rons and polarization of the photons.