Electron Bremsstrahlung from Proton-Excited Targets

Abstract
Formulas are derived for continuous x-ray quantum yields from proton-bombarded targets due to electron acceleration during collision and due to subsequent bremsstrahlung as the electrons stop. Measurements with a proportional counter of yields from a beryllium target bombarded with 1.6-MeV protons are in agreement within a factor of two with calculated bremsstrahlung yields, and they are in qualitative agreement with calculated acceleration yields, which fall in a band at roughly one-quarter of the bremsstrahlung quantum energies.