Thicknessa,b | Transmission factors | ||
Lead | Concrete | Iron | |
0 | 1.0000 | 1.0000 | 1.0000 |
1 | 0.8912 | 0.9583 | 0.7484 |
2 | 0.7873 | 0.9088 | 0.5325 |
3 | 0.6905 | 0.8519 | 0.3614 |
4 | 0.6021 | 0.7889 | 0.2353 |
5 | 0.5227 | 0.7218 | 0.1479 |
6 | 0.4522 | 0.6528 | 0.0905 |
7 | 0.3903 | 0.5842 | 0.0542 |
8 | 0.3362 | 0.5180 | 0.0319 |
9 | 0.2892 | 0.4558 | 0.0186 |
10 | 0.2485 | 0.3987 | 0.0107 |
12 | 0.1831 | 0.3008 | 0.0035 |
14 | 0.1347 | 0.2243 | 0.0011 |
16 | 0.0990 | 0.1662 | 0.0004 |
18 | 0.0728 | 0.1227 | 0.0001 |
20 | 0.0535 | 0.0904 |
|
25 | 0.0247 | 0.0419 |
|
30 | 0.0114 | 0.0194 |
|