Sometimes known as free- free emission, FTP name this radiation produced when charged particles deflect each other, with a name from the German for "braking radiation."
The nonrelativistic cross-section for this process can be obtained using the Born approximation, as shown by Heitler and Bethe. The Weizsäcker-Williams method reduces this process to Thomson scattering involving virtual photons from the Coulomb field. It shows a logarithmic dependence on the ratio of the maximum and minimum impact parameters, expressed as a Gaunt factor. It produces a flat spectrum below a cutoff frequency given by one over the interaction time of the involved charged particles. Sometimes known as free- free emission, FTP name this radiation produced when charged particles deflect each other, with a name from the German for "braking radiation."
The nonrelativistic cross-section for this process can be obtained using the Born approximation, as shown by Heitler and Bethe.
{bremsstrahlung} (accept {free-free} emission or radiation before mention in the question)