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Mechanism for electron transfer in fast ion-atomic collisions
A B Voitkiv B Najjari1, J Ullrich
1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany.
Physical Review Letters
|December 31, 2008
Summary
A new electron capture mechanism in ion-atom collisions, involving the emission of an additional electron, is proposed. This process, termed transfer ionization, results in electron emission primarily backward in the target frame.
Area of Science:
- Atomic and Molecular Physics
- Quantum Mechanics
- Collision Physics
Background:
- Electron capture is a fundamental process in ion-atom collisions.
- Radiative capture, involving photon emission, is a well-understood mechanism.
- A novel, non-radiative electron capture mechanism has remained unexplored.
Purpose of the Study:
- To introduce and discuss a previously unconsidered mechanism for electron capture.
- To explore the phenomenon of transfer ionization in fast ion-atom collisions.
- To analyze the characteristics of this new capture mechanism.
Main Methods:
- Theoretical discussion of a first-order capture mechanism.
- Analysis of electron emission characteristics in the target frame.
- Comparison with established radiative capture processes.
Main Results:
- A novel electron capture mechanism involving the emission of an additional electron is identified.
- This mechanism is termed transfer ionization.
- Electron emission in the target frame is predominantly directed backward.
Conclusions:
- The proposed transfer ionization mechanism offers a new perspective on electron capture in ion-atom collisions.
- This mechanism exhibits unique features, particularly regarding electron emission directionality.
- Further theoretical and experimental investigations are warranted to fully understand this process.
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