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Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
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Published on: July 27, 2018

Delay in atomic photoionization.

A S Kheifets1, I A Ivanov

  • 1Research School of Physical Sciences, The Australian National University, Canberra, ACT 0200, Australia. A.Kheifets@anu.edu.au

Physical Review Letters
|January 15, 2011
PubMed
Summary
This summary is machine-generated.

Researchers investigated the time delay in photoemission from noble gases using attosecond pulses. Numerical modeling could not fully explain the experimental time delay, suggesting the infrared streaking field is the primary cause.

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Last Updated: Jun 5, 2026

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Area of Science:

  • Atomic Physics
  • Quantum Mechanics
  • Ultrafast Science

Background:

  • Photoelectron emission timing is crucial for understanding atomic electron dynamics.
  • Attosecond streaking experiments measure time delays with high precision.
  • Previous studies qualitatively explained time delays but lacked quantitative agreement.

Purpose of the Study:

  • To quantitatively analyze the time delay between photoemission from outer valence ns and np subshells in noble gases.
  • To investigate the contributions of various physical processes to this time delay.
  • To determine the role of the attosecond extreme ultraviolet (XUV) pulse and the infrared (IR) streaking field.

Main Methods:

  • Numerical modeling of photoelectron emission following XUV pulse absorption.
  • Analysis of electron scattering and many-electron correlation effects.
  • Comparison of theoretical predictions with experimental attosecond streaking data.

Main Results:

  • Theoretical models accounted for less than half of the experimentally measured time delay (21 ± 5 as) in Neon.
  • Elastic scattering and electron correlation were insufficient to explain the observed delay.
  • The attosecond XUV pulse alone cannot generate the significant time delay observed.

Conclusions:

  • The measured photoelectron emission time delay is predominantly caused by the streaking IR field.
  • Further investigation is needed to fully understand the complex electron dynamics in attosecond experiments.
  • This study highlights the importance of the probe pulse in attosecond pump-probe spectroscopy.