Abstract
SynopsisWe study single- and two-photon double ionization of helium by short XUV pulses by numerically solving the time-dependent Schrödinger equation in full dimensionality within a finite element discrete variable representation scheme. We discuss the joint energy and angular distributions, identify sequential and non-sequential contributions in the double ionization by ultrashort pulse, and track the dynamics of the ionization process in distinct double ionization regimes.
Highlights
Synopsis We study single- and two-photon double ionization of helium by short XUV pulses by numerically solving the time-dependent Schrodinger equation in full dimensionality within a finite element discrete variable representation scheme
Sequential and non-sequential double ionization of helium atoms has been well studied for decades in electron-momentum resolved spectra [1, 2 and refs. therein]
Solving the time-dependent Schrodinger equation ab initio with our recently developed implementation of a fully dimensional finite-element discrete-variable representation scheme [2] for few-photon double ionization of the helium atom, we investigate the single XUV photon double ionization of helium excited states [for example, He(1s2s1S) and He(1s2p1P )]
Summary
Synopsis We study single- and two-photon double ionization of helium by short XUV pulses by numerically solving the time-dependent Schrodinger equation in full dimensionality within a finite element discrete variable representation scheme.
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