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Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

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Atomic dynamics in single and multi-photon double ionization: An experimental comparison.

T Weber, M Weckenbrock, A Staudte

|May 7, 2009

Summary

This summary is machine-generated.

We studied how rare gas atoms lose two electrons using laser light and synchrotron radiation. Electron correlation plays a key role in both multi-photon and single-photon absorption processes.

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Area of Science:

Atomic Physics
Quantum Mechanics
Chemical Physics

Background:

Electron correlation is crucial in atomic ionization processes.
Understanding multi-photon and single-photon ionization mechanisms provides insight into electron dynamics.

Purpose of the Study:

To investigate and compare the double ionization of rare gas atoms via multi-photon and single-photon absorption.
To analyze the role of electron correlation in these distinct ionization pathways.

Main Methods:

Utilized the COLTRIMS (Cold Target Recoil Ion Momentum Spectroscopy) multi-particle imaging technique.
Employed 800 nm (1.5 eV) femtosecond laser pulses for multi-photon absorption.
Used synchrotron radiation for single-photon absorption experiments.

Main Results:

Observed and analyzed the three-body final state momentum distributions for both ionization processes.
Identified similarities and differences in the momentum distributions, highlighting the influence of electron correlation.

Conclusions:

Electron correlation is a fundamental mechanism governing both multi-photon and single-photon double ionization in rare gases.
The COLTRIMS technique provides detailed insights into the complex dynamics of atomic ionization.