Abstract
Kaminsky has recently observed during 14 MeV neutron irradiation of a variety of materials that substantial (micron-sized) particles are ejected from the surfaces of the bombarded specimens. Similarities between Kaminsky's observations and the macroscopic phenomena of spall suggested the possibility that shock waves and transient thermal stresses, generated by energetic primary knock-ons, may be in part responsible. A brief discussion of spall phenomena will be presented as background to calculations of the shock wave interactions. The results indicate that cascade generated stresses may be responsible for the emission of such particles by triggering the release of stored internal energy.
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