Suprathermal proton bremsstrahlung

In the process of suprathermal proton bremsstrahlung a suprathermal proton, or if you prefer, simply an energetic proton, strikes a relatively motionless electron in a background plasma and causes the electron to radiate. The differential cross section as a function of energy of the emitted photon calculated was believed to be superior to the conventional one in the case of relativistic collisions.