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Second scatterer areal thickness as a function of the radial distance from the central axis. Each layer of the high-Z portion of the second scatterer was modeled as a disk and each layer of the low-Z was modeled as an annulus.
| Radius (mm) | PMMA (kg m−2) | Lead (kg m−2) |
|---|---|---|
| 0.1 | 0.00 | 29.40 |
| 5.04 | 0.91 | 27.72 |
| 10.08 | 3.37 | 23.18 |
| 15.12 | 6.81 | 17.32 |
| 20.16 | 10.47 | 10.05 |
| 25.20 | 13.37 | 4.65 |
| 30.24 | 15.11 | 1.44 |
| 35.28 | 15.89 | 0.00 |
| 40.31 | 15.89 | 0.00 |
| 45.35 | 15.89 | 0.00 |
