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Related Experiment Videos

Experimental evidence for interatomic coulombic decay in Ne clusters.

S Marburger1, O Kugeler, U Hergenhahn

  • 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.

Physical Review Letters
|June 6, 2003
PubMed
Summary

Researchers observed a new electron signal in neon clusters, providing evidence for interatomic Coulombic decay (ICD). This decay mechanism involves energy transfer between atoms, leading to electron emission in weakly bonded systems.

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Area of Science:

  • Atomic and Molecular Physics
  • Quantum Chemistry
  • Condensed Matter Physics

Background:

  • Inner-valence ionization creates excited states in atoms and molecules.
  • Weakly bonded systems, like clusters, exhibit unique electronic relaxation pathways.
  • Interatomic Coulombic decay (ICD) was theoretically predicted as a novel electron emission mechanism.

Purpose of the Study:

  • To experimentally investigate electron emission following photoexcitation of neon clusters.
  • To identify spectral signatures indicative of interatomic Coulombic decay (ICD).
  • To validate theoretical predictions of ICD in atomic systems.

Main Methods:

  • Photoexcitation of neon clusters using tunable synchrotron radiation.
  • High-resolution electron spectroscopy to analyze kinetic energy distributions.

Related Experiment Videos

  • Comparison of spectra from neon clusters and neon monomers.

    • Main Results:

    • Observation of a distinct low-kinetic-energy electron signal in photoexcited neon clusters.
    • This signal was absent in neon monomers and at sub-threshold photon energies.
    • The observed signal strongly correlates with the predicted signature of interatomic Coulombic decay (ICD).

    Conclusions:

    • The experimental results provide compelling evidence for the occurrence of interatomic Coulombic decay (ICD) in neon clusters.
    • ICD is confirmed as a significant ultrafast relaxation pathway in weakly bonded atomic systems.
    • This study validates theoretical models and opens avenues for exploring ICD in diverse molecular and solid-state systems.