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Table 2
Activity concentrations of 238U, 232Th and 40K in soil, air absorbed dose rates and annual effective dose following radioactivity measurements at the laboratory.
| Location | Activity concentration (Bq kg−1) | Absorbed dose rate | Annual effective dose |
||||
|---|---|---|---|---|---|---|---|
| Sample code | Latitude | Longitude | 40K | 238U | 232Th | (nGy h−1) | (mSv y−1) |
| STN-16-39 | 04°01’640” | 09°44’424” | 40 ± 8 | 88 ± 17 | 82 ± 18 | 92 ± 13 | 0.6 ± 0.1 |
| STN-16-40 | 04°01’625” | 09°44’510” | 41 ± 9 | 52 ± 10 | 53 ± 12 | 58 ± 9 | 0.4 ± 0.1 |
| STN-16-41 | 04°01’642” | 09°44’345” | 43 ± 9 | 66 ± 13 | 64 ± 14 | 72 ± 10 | 0.5 ± 0.1 |
| STN-16-42 | 04°01’395” | 09°44’284” | 53 ± 11 | 39 ± 08 | 37 ± 8 | 43 ± 6 | 0.3 ± 0 (˂ 0.1) |
| STN-16-43 | 04°01’342” | 09°44’240” | 42 ± 9 | 52 ± 10 | 48 ± 11 | 55 ± 8 | 0.4 ± 0.1 |
| STN-16-44 | 04°01’136” | 09°44’239” | 77 ± 16 | 29 ± 06 | 29 ± 6 | 34 ± 5 | 0.2 ± 0 (˂ 0.1) |
| STN-16-45 | 04°00’995” | 09°44’766” | 44 ± 9 | 65 ± 13 | 68 ± 15 | 73 ± 11 | 0.5 ± 0.1 |
| STN-16-46 | 04°00’907” | 09°44’810” | 47 ± 10 | 69 ± 14 | 69 ± 15 | 76 ± 11 | 0.5 ± 0.1 |
| STN-16-47 | 04°00’835” | 09°44’746” | 60 ± 13 | 39 ± 08 | 36 ± 8 | 43 ± 6 | 0.3 ± 0 (˂ 0.1) |
| STN-16-48 | 04°00’769” | 09°44’619” | 59 ± 13 | 52 ± 10 | 54 ± 12 | 59 ± 9 | 0.4 ± 0.1 |
| STN-16-49 | 04°00’822” | 09°44’595” | 62 ± 13 | 43 ± 08 | 42 ± 9 | 48 ± 7 | 0.3 ± 0 (˂ 0.1) |
| STN-16-50 | 04°00’861” | 09°44’702” | 43 ± 9 | 56 ± 11 | 58 ± 13 | 63 ± 9 | 0.4 ± 0.1 |
| STN-16-51 | 04°01’047” | 09°44’320” | 51 ± 11 | 58 ± 11 | 51 ± 11 | 60 ± 8 | 0.4 ± 0.1 |
| STN-16-52 | 04°01’016” | 09°44’089” | 64 ± 13 | 62 ± 12 | 54 ± 12 | 65 ± 9 | 0.4 ± 0.1 |
| STN-16-53 | 04°01’258” | 09°44’046” | 74 ± 16 | 61 ± 12 | 55 ± 12 | 65 ± 9 | 0.4 ± 0.1 |
| STN-16-54 | 04°01’302” | 09°44’055” | 67 ± 14 | 40 ± 08 | 38 ± 8 | 45 ± 6 | 0.3 ± 0 (˂ 0.1) |
| STN-16-55 | 04°01’433” | 09°44’016” | 79 ± 17 | 66 ± 13 | 62 ± 14 | 72 ± 10 | 0.5 ± 0.1 |
| STN-16-56 | 04°01’421” | 09°43’763” | 68 ± 14 | 82 ± 16 | 74 ± 16 | 86 ± 12 | 0.6 ± 0.1 |
| STN-16-57 | 04°01’371” | 09°43’740” | 52 ± 11 | 81 ± 16 | 79 ± 17 | 88 ± 13 | 0.6 ± 0.1 |
| STN-16-58 | 04°01’188” | 09°43’941” | 46 ± 10 | 96 ± 19 | 92 ± 20 | 102 ± 15 | 0.7 ± 0.1 |
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