A particular study was made of the behavior of displacement damage production which was caused by high-energy recoils that were due to charged-particle nuclear reactions. An examination of excitation functions and mean recoil ranges led to non-elastic primary knock-on atom spectra. A comparison of charged particle and fusion neutron-induced primary knock-on atom spectra indicated that the charged particle-induced non-elastic fraction contributed considerably to the spectra. The closest fit was found for a 20MeV proton-induced spectrum. It was concluded that, at the highest energies which were used, the ratio of non-elastic dpa to the total value was equal to 0.43 for protons and to 0.47 for -particles.

E.Daum, J.Bertsch, A.Moeslang: Journal of Nuclear Materials, 1996, 233-237B, 959-63