Holographic imaging of ionic core potentials using doubly differential electron momentum distributions

K. SCHIESSL, D.G. ARBÓ, E. PERSSON, J. BURGDÖRFER

Freiburg, Alemania

Conferencia; XXV International Conference on the Photonic, Electronic and Atomic Collisions; 2007

Ionization by laser pulses with intensities at the cross-over between the multiphoton and the tunneling regime is still significantly influenced by the remaining atomic core. Recent calculation and experiments have shown that doubly differential electron momentum distributions carry information about the core potential, particularly near threshold (momentum k ! 0) [1, 2]. This was dubbed “holographic imaging” of the atomic core potential [3]. Within single-electron approach involving the solution of the time-dependent Schr¨odinger equation for model potentials, we extend the analysis of doubly-differential momentum distributions to various rare gas atoms like e. g. xenon. Differences in near-threshold spectra are  linked to different model potentials. One sensitive observable is the distribution of angular momenta for low energy electrons ionized from xenon (Fig. 1) for different model potentials (Fig. 2) that feature the same ionization potential.k ! 0) [1, 2]. This was dubbed “holographic imaging” of the atomic core potential [3]. Within single-electron approach involving the solution of the time-dependent Schr¨odinger equation for model potentials, we extend the analysis of doubly-differential momentum distributions to various rare gas atoms like e. g. xenon. Differences in near-threshold spectra are  linked to different model potentials. One sensitive observable is the distribution of angular momenta for low energy electrons ionized from xenon (Fig. 1) for different model potentials (Fig. 2) that feature the same ionization potential.