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Table 2
Analytical result of rock samples from Madong.
| Location | Sampling site ID | Number of samples | Mean radioactivity concentration (Bq · kg−1) | Dose rate (nGy · h−1) | Radiation hazard indices | |||
|---|---|---|---|---|---|---|---|---|
| 226Ra | 232Th | 40K | Raeq (Bq · kg−1) | Hex | ||||
| Madong | MA-01 | 05 | 18 ± 2 | 299 ± 3 | 1580 ± 18 | 260 ± 4 | 567 ± 8 | 1.53 ± 0.02 |
| MA-02 | 05 | 21 ± 1 | 183 ± 4 | 1861 ± 22 | 201 ± 4 | 426 ± 8 | 1.15 ± 0.02 | |
| MA-03 | 05 | 38 ± 1 | 78 ± 1 | 1050 ± 6 | 110 ± 1 | 230 ± 3 | 0.62 ± 0.01 | |
| MA-04 | 05 | 283 ± 6 | 819 ± 6 | 1995 ± 22 | 723 ± 8 | 1607 ± 18 | 4.34 ± 0.04 | |
| MA-05 | 05 | 89 ± 2 | 580 ± 2 | 1990 ± 16 | 485 ± 3 | 1072 ± 6 | 2.89 ± 0.02 | |
| MA-06 | 05 | 18 ± 1 | 20 ± 1 | 1902 ± 14 | 99 ± 2 | 193 ± 4 | 0.52 ± 0.01 | |
| Meana | – | 78 ± 104 | 329 ± 311 | 1730 ± 366 | 312 ± 245 | 683 ± 553 | 1.84 ± 1.49 | |
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