The displacement of reciprocal lattice parameters of different Bragg planes such as {110}, {200}, {211}, {222}, and {431} as a function of cumulative dose is shown in fig. ), respectively. This increase in reciprocal lattice parameters indicates the lattice shrinkage in real space. The initial and final real-space lattice parameter of {110} Bragg plane is measured as 12.2 Å and 11.0 Å, respectively, and the total lattice plane shrinkage is measured as 1.2 Å, as shown in fig. ). Relative displacement is measured as the ratio of displacement of the Bragg plane at a certain accumulated dose and total displacement.