Nonsequential double ionization below laser-intensity threshold: Anticorrelation of electrons without excitation of parent ion

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DOIResolve DOI: http://doi.org/10.1103/PhysRevA.83.013420
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TypeArticle
Journal titlePhysical Review A - Atomic, Molecular, and Optical Physics
ISSN1050-2947
Volume83
Issue1
Article number13420
SubjectAnalytic models; Anticorrelation; Closed form solutions; Dinger equation; Field ionization; Intensity threshold; Model system; Nonsequential double ionizations; Numerical solution; Recollision; Time-dependent; Ionization of gases; Ions; Laser beam welding; Laser excitation; Electrons
AbstractTwo-electron correlated spectra of nonsequential double ionization below laser-intensity threshold are known to exhibit back-to-back scattering of the electrons, i.e., the anticorrelation of the electrons. Currently, the widely accepted interpretation of the anticorrelation is recollision-induced excitation of the ion plus subsequent field ionization of the second electron. We argue that another mechanism, namely, simultaneous electron emission, when the time of return of the rescattered electron is equal to the time of liberation of the bounded electron (i.e., the ion has no time for excitation), can also explain the anticorrelation of the electrons in the deep, below laser-intensity threshold regime. Our conclusion is based on the results of the numerical solution of the time-dependent Schrödinger equation for a model system of two one-dimensional electrons, as well as on an adiabatic analytic model that allows for a closed-form solution. © 2011 American Physical Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21271674
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Record identifier42f6530b-77e4-4a5c-a4b8-4cd1571f89ae
Record created2014-03-24
Record modified2016-05-09
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