Figure 1

Schematic illustration of the technique for sampling the energy deposition by electrons: (A) is for the track structure of electrons with 10, 30 and 50 keV simulated by the WLTrack code¹³, and (B) is for the sampling technique to calculate the lineal energy, y_D (keV/μm). To calculate the y_D value, we took two steps: (1) select scoring positions (indicated by blue dots) on a grid pattern considered for electron track structures (indicated by a dotted black line), (2) set sampling sphere site (indicated by red circles) centering on sampling positions and score the energy deposition in each site. The radius of the sphere is the same as the grid size.