Stabilization of helium in intense xuv laser fields

We investigate the impact of electron-electron correlation on the ionization dynamics of helium in intense, high-frequency laser fields by solving the time-dependent Schrödinger equation from first principles. Although we observe a decrease in the total ionization yield at high field strengths, the...

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Bibliographic Details
Published in:Physical review letters 2010-04, Vol.104 (16), p.163002-163002, Article 163002
Main Authors: Birkeland, T, Nepstad, R, Førre, M
Format: Article
Language:English
Subjects:
CHARGED PARTICLES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CORRELATIONS
DIFFERENTIAL EQUATIONS
ELECTROMAGNETIC RADIATION
ELECTRON CORRELATION
ELECTRON-ELECTRON INTERACTIONS
ELEMENTS
EQUATIONS
EXTREME ULTRAVIOLET RADIATION
FLUIDS
GASES
HELIUM
INTERACTIONS
IONIZATION
IONS
LASER RADIATION
LEPTON-LEPTON INTERACTIONS
NONMETALS
ONE-DIMENSIONAL CALCULATIONS
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE INTERACTIONS
PULSES
RADIATIONS
RARE GASES
SCHROEDINGER EQUATION
STABILIZATION
TIME DEPENDENCE
ULTRAVIOLET RADIATION
WAVE EQUATIONS
YIELDS
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Summary:We investigate the impact of electron-electron correlation on the ionization dynamics of helium in intense, high-frequency laser fields by solving the time-dependent Schrödinger equation from first principles. Although we observe a decrease in the total ionization yield at high field strengths, the hallmark of atomic stabilization, the repulsion between the electrons has a detrimental effect on the degree of stabilization, in particular for short pulses. Investigation of the ion channel yields reveals that the double ionization process is less prone to two-electron effects, and consequently exhibits the most distinct signature of stabilization. We also find that commonly used one-dimensional models tend to overestimate the effect of correlation.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.104.163002