Table 3 Monte Carlo simulation calculated percentages of photons in the energy range of 25–150 keV, and electrons generated by an aluminum target beam with various polystyrene thicknesses
Thickness (mm) | Proportion (%) | |
|---|---|---|
20–150 keV photons | Electrons | |
None | 34.4 | 35.8 |
4 | 34.6 | 26.1 |
6 | 34.7 | 20.3 |
8 | 34.7 | 14.4 |
10 | 34.8 | 9.3 |
12 | 34.8 | 5.3 |
14 | 34.8 | 2.7 |
16 | 34.7 | 1.4 |
18 | 34.7 | 0.8 |
20 | 34.7 | 0.5 |