Double Ionisation in R-Matrix Theory Using a 2-electron Outer Region

Abstract

We have developed a two-electron outer region for use within R-matrix theory to describe double ionisation processes. The capability of this method is demonstrated for single-photon double ionisation of He in the photon energy region between 80 eV to 180 eV. The cross sections are in agreement with established data. The extended RMT method also provides information on higher-order processes, as demonstrated by the identification of signatures for sequential double ionisation processes involving an intermediate He${}^{+}$ state with $n=2$.

5 pages, 4 figures

References in corpus (4)

• A combined R-matrix eigenstate basis set and finite-differences propagation method for the time-dependent Schr\"{od}dinger equation: the one-electron case
• Time-dependent R-matrix theory applied to two-photon double ionization of He
• Population trapping in bound states during IR-assisted ultra-fast photoionization of Ne${}^{+}$
• Electron dynamics in the carbon atom induced by spin-orbit interaction

Cited by in corpus (5)

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• On the Cooper Minimum in Singly ionized and Neutral Argon
• Spin and spatial dynamics in electron-impact scattering off S-wave He using R-matrix with Time-Dependence theory
• R-Matrix incorporating Time (RMT) method for H2+ in short and intense laser fields