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Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
Published on: February 14, 2014
Laser-assisted positron-impact ionization of atomic hydrogen
Juan Pan1, Shu-Min Li, Jamal Berakdar
1Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui.
We investigated atomic hydrogen ionization by positrons under laser influence. Results show how laser fields affect electron ejection, offering insights comparable to electron impact studies.
Area of Science:
- Atomic Physics
- Quantum Mechanics
- Laser-Plasma Interactions
Background:
- Atomic hydrogen ionization is a fundamental process.
- Understanding electron ejection dynamics is crucial.
- Laser fields significantly alter atomic ionization processes.
Purpose of the Study:
- To investigate the ionization of atomic hydrogen by fast positrons in a laser field.
- To analyze the influence of laser parameters on ionization dynamics.
- To compare positron impact ionization with electron impact ionization under similar conditions.
Main Methods:
- Utilizing Volkov wave functions for positron continuum states.
- Employing Coulomb-Volkov wave functions for ejected electrons.
- Applying time-dependent perturbation theory for dressed target states.
- Calculating triply differential cross sections numerically.
Main Results:
- Detailed numerical results for triply differential cross sections were obtained.
- Dependencies of cross sections on laser-field parameters were analyzed.
- Comparisons were made with laser-assisted electron impact ionization.
Conclusions:
- The study provides a theoretical framework for understanding positron-driven atomic ionization in laser fields.
- The findings offer insights into the role of projectile type (positron vs. electron) in laser-assisted ionization.
- This research contributes to the field of strong-field atomic physics.
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