Re-use of this resource is governed by a Creative Commons Attribution-
NonCommercial-ShareAlike 4.0 International
creative commons DoITPoMS logo
Displacement spike
1 n nth order knock-on atom simulationSpeedText incident neutron
Instructions: Click "Start" to cause an neutron (not shown) to displace a primary knock-on atom. This atom will then displace others, to create a depleted zone of vacancies with interstitial atoms surrounding it. The key provides an easy way to see what caused the displacement of the atom, whether it's the initial neutron (bright red), the first displaced atom (slightly darker red), etc. Select the "draw lines" option to more easily visualise the lattice structure.