Layer | Pb-210 | Ra-226 | Ra-228 | K-40 | Ra-228/Ra-226 |
cm | mBq/g | mBq/g | mBq/g | mBq/g |
|
0 - 2 | 18 | 69 | 42 | 430 | 0.6 |
2 - 4 | <1.7 | 49 | 35 | 450 | 0.7 |
4 - 6 | 7 | 44 | 36 | 480 | 0.8 |
6 - 8 | <1.7 | 42 | 38 | 650 | 0.9 |
8 - 10 | 51 | 40 | 36 | 550 | 0.9 |
10 - 12 | 31 | 35 | 32 | 505 | 0.9 |
12 - 14 | 60 | 41 | 43 | 570 | 1.0 |
14 - 16 | 12 | 32 | 32 | 490 | 1.0 |
16 - 18 | 31 | 38 | 34 | 510 | 0.9 |
18 - 20 | 35 | 41 | 34 | 560 | 0.8 |
20 - 22 | 16 | 38 | 38 | 405 | 1.0 |
22 - 24 | <1.7 | 37 | 39 | 620 | 1.0 |
24 - 26 | 44 | 35 | 39 | 615 | 1.1 |
26 - 28 | <1.7 | 40 | 38 | 590 | 0.9 |