Bremsstrahlung cross-section with screening and Coulomb corrections at high energies

摘要

Using analytical formulae which are exact in Born approximation,the doubly differential bremsstrahlung cross-section with form-factor screening is calculated.For the atomic form factor parameters are applied which approximate self-consistent Dirac-Har-tree-Fock-Slater calculations.The evaluation of the bremsstrahlung spectrum requires a single numerical integration.The results are superior to the customary Bethe approximation,in particular at the high-energy part of the spectrum.At high energies the screening correction can be added to any Coulomb-corrected cross-section without screening.In the present work,we are using a cross-section calculated by means of Sommerfeld-Maue functions with additional higher-order terms.