Correlation functions in the theory of atomic collision cascades: Ion location and the distribution in depth and size of damage clusters

RADIATION-INDUCED VOIDS IN METALS. Proceedings of the 1971 International Conference Held at Albany, New York, June 9--11, 1971.

“…This shape is evident in Fig. 15, which shows the voids viewed in (111) and (110) foil orientations. Apparently there is a slight amount of truncation on the (110) faces of the cubes.…”

“…Finally, a nonrandom alignment of voids was also found in niobium irradiated at 80OOC. Figure 16 shows this alignment when viewed in a (111) foil orientation. The rows of voids, parallel to <112> directions, suggest a body-centered cubic (bcc) superlattice of voids in contrast to the fcc superlattice in nickel.…”

“…In no case was any v attributed to an apparent missing atom, unless the v was certified visually in the FIM micrograph. The depleted zone appeared to be contained completely within the bounds of this stack of successive (111) planes, since n o v's were found on any of the planes directly adjacent to it. In the entire volume of the specimen examined (-lo-' ' cm3) this was the only depleted zone detected; hence we conclude that it was caused by a single incident ion.…”

“…The morphology of voids in the fcc structure can best be described as a tetrakaidecahedron with (111) and (100) faces. There is some question as t o whether the basic or initial shape is the (100) cube with (111) truncation or the (111) octahedron with (100) truncation.…”

Shock wave interactions arising from near surface displacement cascades

“…While cascade dimensions can be estimated by random cascade theory [13,14] from the projected PICA range, R , crystalline effects require some caution in applying these results [8,14] to a description of an individual cascade. To provide a frame of reference, we have calculated R from the theory of Lindhard, Scharf, and Schiott (LSS) [15].…”