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Jakubassa-Amundsen, D. H. (2020): An asymptotic DSM theory for high-energy near-tip bremsstrahlung. In: Journal of Physics G-Nuclear and Particle Physics, Vol. 47, No. 7, 075102
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The Dirac-Sommerfeld-Maue theory for relativistic electron-nucleus bremsstrahlung at the short-wavelength limit is extended to cover an energy range from 0 to 3 MeV of the outgoing electron, irrespective of collision energy. This is achieved by using an asymptotic representation of the Sommerfeld-Maue function for the impinging electron, valid at energies above 50 MeV, as well as a partial-wave expansion for the final electronic state. The model is used to show that the analytical Sommerfeld-Maue theory is applicable for the calculation of the singly differential cross section, if the energy of the scattered electron exceeds about 3 MeV.