Physics – Atomic and Molecular Clusters
Scientific paper
2011-06-05
Physical Review Letters 107, 273002 (2011)
Physics
Atomic and Molecular Clusters
5 figures, Supplemental material file
Scientific paper
10.1103/PhysRevLett.107.273002
To exploit the high intensity of laser radiation, we propose to select frequencies at which single-photon absorption is of too low energy and two or more photons are needed to produce states of an atom that can undergo interatomic Coulombic decay (ICD) with its neighbors. For Ne dimer it is explicitly demonstrated that the proposed scheme to investigate interatomic processes by multiphoton absorption is much more efficient than with single-photon absorption of sufficiently large frequency as used until now. Extensive calculations on Ne dimer including all the involved nuclear dynamics and the losses by ionization of the participating states show how the low-energy ICD electrons and Ne$^+$ pairs are produced for different laser intensities and pulse durations. At higher intensities the production of Ne$^+$ pairs by successive ionization of the two atoms becomes competitive and the respective emitted electrons interfere coherently with the ICD electrons. It is also demonstrated that a measurement after a time delay can be used to determine the contribution of ICD even at high laser intensity.
Cederbaum Lorenz S.
Demekhin Philipp V.
Kuleff Alexander I.
Stoychev Spas D.
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