User menu

Accès à distance ? S'identifier sur le proxy UCLouvain

Closure approximation in the theory of two-photon double ionization of atoms

Primary tabs

Chuluunbaatar, O. Bachau, H. Popov, Y.V. Piraux, Bernard [UCL]

We consider two-photon double ionization of helium with 100, 200, and 400 eV excess energy. We focus on the case of ultrashort pulses and develop an approach to calculate the two-photon transition matrix elements within the lowest order of the time-dependent perturbation theory. It is shown, that in the subfemtosecond regime the intermediate Green's function can be successfully evaluated by means of the closure approximation. © Published under licence by IOP Publishing Ltd.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2012
Language Anglais
Journal information "Journal of Physics: Conference Series" - Vol. 388, no.PART 3, p. part 032004 (2012)
Publisher IOP Science
issn 1742-6588
e-issn 1742-6596
Publication status Publié
Affiliations UCL - SST/IMCN - Institute of Condensed Matter and Nanosciences
UCL - SST/IMCN/NAPS - Nanoscopic Physics
Keywords Closure approximation ; Excess energy ; Time-dependent perturbation theory ; Two-photon double ionization ; Two-photon transitions ; Atoms ; Helium ; Photons ; Photoionization
Links
Bibliographic reference Chuluunbaatar, O. ; Bachau, H. ; Popov, Y.V. ; Piraux, Bernard. Closure approximation in the theory of two-photon double ionization of atoms. In: Journal of Physics: Conference Series, Vol. 388, no.PART 3, p. part 032004 (2012)
Permanent URL http://hdl.handle.net/2078/124762