Table 7 Simulated components of scatter within energy window for different collimator materials and designs
Material | Tungsten | Lead (2% Sb) | ||
|---|---|---|---|---|
Density (g/cm) | 100 | 80 | 80 | 100 |
Septal thickness (mm) | 0.20 | 0.20 | 0.22 | 0.20 |
Geometrical collimation | 86.7% | 80.6% | 82.2% | 79.2% |
Penetration through septa | 6.7% | 9.1% | 8.9% | 10.2% |
Scatter within collimator | 6.6% | 10.3% | 8.9% | 10.6% |
Relative geometric efficiency | 100% | 100% | 94% | 100% |