Ultrafast electro-nuclear dynamics of H2 double ionization

Details Ultrafast electro-nuclear dynamics of H2 double ionization Ultrafast electro-nuclear dynamics of H2 double ionization

2007-01-11

arxiv.org/abs/quant-ph/0701059v3

Physical Review Letters 98, 25 (2007) 253003

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.98.253003

The ultrafast electronic and nuclear dynamics of H2 laser-induced double ionization is studied using a time-dependent wave packet approach that goes beyond the fixed nuclei approximation. The double ionization pathways are analyzed by following the evolution of the total wave function during and after the pulse. The rescattering of the first ionized electron produces a coherent superposition of excited molecular states which presents a pronounced transient H+H- character. This attosecond excitation is followed by field-induced double ionization and by the formation of short-lived autoionizing states which decay via double ionization. These two double ionization mechanisms may be identified by their signature imprinted in the kinetic-energy distribution of the ejected protons.

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