Calculations of photoelectron momentum distributions and energy spectra at strong-field multiphoton ionization of sodium

Multiphoton ionization of sodium by a femtosecond laser pulse of 760 nm wavelength and different peak intensities is studied by inspecting the photoelectron angular and momentum distributions and the energy spectra. For this purpose a single-electron model of the atom interacting with the electromag...

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Bibliographic Details
Published in:The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2017-08, Vol.71 (8), p.1-6, Article 208
Main Authors: Bunjac, Andrej, Popović, Duška B., Simonović, Nenad S.
Format: Article
Language:English
Subjects:
Angular momentum
Applications of Nonlinear Dynamics and Chaos Theory
Atomic
Electromagnetic fields
Energy spectra
Femtosecond pulses
Ionization
Lasers
Maxima
Molecular
Optical and Plasma Physics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Information Technology
Quantum Physics
Regular Article
Sodium
Spectroscopy/Spectrometry
Spintronics
Substructures
Topical Issue: Physics of Ionized Gases (SPIG 2016)
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Summary:Multiphoton ionization of sodium by a femtosecond laser pulse of 760 nm wavelength and different peak intensities is studied by inspecting the photoelectron angular and momentum distributions and the energy spectra. For this purpose a single-electron model of the atom interacting with the electromagnetic field is used, and the distributions are determined by calculating the evolution of the electron wave function. Beside the most prominent distribution maxima related to the four-photon ionization, the five-photon (above-threshold) ionization peaks are observed. Substructures in the main (nonresonant) maximum in the photoelectron spectra at the four-photon ionization are related to the resonantly enhanced multiphoton ionization via intermediate 4 s , 4 f , 5 p , 5 f and 6 p states. Graphical abstract
ISSN:1434-6060
1434-6079
DOI:10.1140/epjd/e2017-80276-5