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Semiclassical Dirac theory of tunnel ionization
N Milosevic1, V P Krainov, T Brabec
1Institut für Photonik, Technische Universität Wien, A-1040 Vienna, Austria.
Physical Review Letters
|November 22, 2002
Summary
We calculated tunneling ionization rates for atomic ions in intense laser fields using a relativistic quantum model. This work quantifies tunneling ionization in the relativistic regime for the first time.
Area of Science:
- Atomic physics
- Quantum mechanics
- Laser-matter interactions
Background:
- Tunnel ionization is a key process in strong laser fields.
- Previous models often neglect relativistic effects for atomic ions.
- Understanding ionization in highly charged ions is crucial for plasma physics.
Purpose of the Study:
- To determine analytic tunnel ionization rates for hydrogenlike ions in ultrahigh intensity laser fields.
- To provide the first quantitative analysis of tunneling ionization in the relativistic regime for atomic ions.
- To enable the study of strong laser field interactions with highly charged ions.
Main Methods:
- A semiclassical solution of the three-dimensional Dirac equation was employed.
- Analytic expressions for ionization rates were derived.
- The study focused on the relativistic regime of laser-matter interaction.
Main Results:
- Analytic tunnel ionization rates for hydrogenlike ions were successfully derived.
- The quantitative determination of tunneling ionization in the relativistic regime was achieved.
- The results are applicable to ultrahigh intensity laser fields.
Conclusions:
- The developed theory accurately describes tunnel ionization in relativistic conditions.
- This research opens new avenues for studying strong field phenomena with highly charged ions.
- Relativistic ionization is a dominant factor in these interactions.
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