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Very fast hollow-atom decay processes in Xe30+-C60 collisions
1Laboratoire de Spectrométrie Ionique et Moléculaire, Université Lyon 1, UMR CNRS 5579, 43 boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France.
Physical Review Letters
|October 26, 2002
Summary
Fast electron ejection occurs in Xenon (Xe30+) and fullerene (C60) collisions. A decay model explains electron emission, estimating a high Auger rate during brief interactions.
Area of Science:
- Atomic and Molecular Physics
- Collision Physics
- Quantum Chemistry
Background:
- Investigating ion-fullerene collisions provides insights into complex atomic interactions.
- Understanding electron emission dynamics is crucial for plasma physics and materials science.
Purpose of the Study:
- To analyze fast electron ejection during low-velocity Xe30+-C60 collisions.
- To model the electron emission process and determine the Auger decay rate.
Main Methods:
- Experimentally studying Xe30+ impact on C60 at low velocities (0.2-0.4 a.u.).
- Applying a multistep exponential decay model to analyze exit-charge distributions from frontal collisions.
Main Results:
- Observed very fast electron ejection in both frontal and near-cage C60 collisions.
- Successfully reproduced exit-charge distributions using the decay model for frontal collisions.
- Estimated a mean Auger rate of approximately 0.4 a.u. for hollow atom decay.
Conclusions:
- Fast electron ejection is a significant phenomenon in low-velocity ion-fullerene collisions.
- The multistep exponential decay model effectively describes electron emission dynamics.
- The estimated Auger rate highlights the rapid de-excitation processes in highly charged ions interacting with fullerenes.