We study spontaneous bremsstrahlung emission in a highly intense laser field. In this regime the interaction with the laser field has to be treated nonperturbatively by using the relativistic formalism including Dirac-Volkov propagators, while the interaction with the Coulomb field and the bremsstrahlung radiation can be treated in first-order perturbation theory. For the intermediate electron state a fully laser-dressed propagator is used, including radiative corrections to avoid singularities on the mass shell. We find that the use of the Dirac-Volkov propagator is crucial to obtain correct numerical results. The cross section of the process is evaluated for laser intensities of order 1020W/cm2 and relativistic energies of the initial electron.
E. Lotstedt et al., "Evaluation of Laser-Assisted Bremsstrahlung with Dirac-Volkov Propagators," Physical Review Letters, vol. 98, no. 4, pp. 043002-1-043002-4, American Physical Society (APS), Jan 2007.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevLett.98.043002
Keywords and Phrases
Electromagnetic Wave Propagation; Electron Beams; Numerical Analysis; Perturbation Techniques; Dirac-Volkov Propagators; Laser Fields; Relativistic Energies; Relativistic Formalism
International Standard Serial Number (ISSN)
Article - Journal
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