The relative intensity and relative displacement of {110} Bragg plane as a function of cumulative dose is plotted in fig. (a) using a blue and a red curve, respectively. The cumulative dose is considered as the critical dose when the relative intensity of the {110} Bragg plane decreases by 1/e (i.e., by 37 %) . The critical dose of {110} Bragg plane is around 35 e -Å -2 , as marked by a blue line in fig. . The local peak maxima in the relative intensities of {110} Bragg planes near critical dose are due to particle reorientation when exposed to an electron beam at RT, also reported before .