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Resonantly enhanced photoionization in correlated three-atomic systems

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons30836

Najjari,  Bennaceur
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons30828

Müller,  C.
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;
Institut für Theoretische Physik I, Heinrich-Heine Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany ;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons31145

Voitkiv,  A.B.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

Externe Ressourcen
Volltexte (frei zugänglich)

1203.2038
(Preprint), 284KB

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Zitation

Najjari, B., Müller, C., & Voitkiv, A. (2012). Resonantly enhanced photoionization in correlated three-atomic systems. New Journal of Physics, 14(10): 105028, pp. 1-14. Retrieved from http://arxiv.org/abs/1203.2038.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-758E-3
Zusammenfassung
Modifications of photoionization arising from resonant electron-electron correlations between neighbouring atoms in an atomic sample are studied. The sample contains atomic species A and B, with the ionization potential of A being smaller than the energy of a dipole-allowed transition in B. The atoms are subject to an external radiation field which is near-resonant with the dipole transition in B. Photoionization of an atom A may thus proceed via a two-step mechanism: photoexcitation in the subsystem of species B, followed by interatomic Coulombic decay. As a basic atomic configuration, we investigate resonant photoionization in a three-atomic system A-B-B, consisting of an atom A and two neighbouring atoms B. It is found that, under suitable conditions, the influence of the neighbouring atoms can strongly affect the photoionization process, including its total probabilty, time development and photoelectron spectra. In particular, by comparing our results with those for photoionization of an isolated atom A and a two-atomic system A-B, respectively, we reveal the characteristic impact exerted by the third atom.