Radiation Halving Thickness Chart
Material | Halving Thickness [inches] | PF40 [inches] | PF300 [inches] | PF1000 [inches] |
Lead | 0.4 | 2.1 | 3.2 | 4.0 |
Iron | 0.9 | 4.8 | 7.2 | 9.0 |
Steel | 1.0 | 5.3 | 8.0 | 10.0 |
Stone | 2.2 | 11.7 | 17.6 | 22.0 |
Concrete | 2.4 | 12.7 | 19.2 | 24.0 |
Aluminum | 2.7 | 14.3 | 21.6 | 27.0 |
Brickwork | 2.8 | 14.8 | 22.4 | 28.0 |
Sand | 2.9 | 15.4 | 23.2 | 29.0 |
Packed Soil | 3.6 | 19.1 | 28.8 | 36.0 |
Water | 7.2 | 38.2 | 57.6 | 72.0 |
Wood | 11.0 | 58.3 | 88.0 | 110.0 |