Sample No. | U (ug/g) | Th (ug/g) | Ka (ug/g) | Annual dose (mrad/a) | De (Gy) | Error (%) | TL (Ka) |
1 | 2.303 | 13.92 | 24,710 | 4.1619 | 292.43 | 4 | 70.3 ± 2.8 |
12 | 2.291 | 12.8 | 23,760 | 3.9717 | 314.67 | 4 | 79.2 ± 3.2 |
18 | 2.201 | 12.49 | 28,430 | 4.0115 | 344.26 | 4 | 85.8 ± 3.4 |
28 | 2.169 | 12.71 | 23,720 | 3.9058 | 392.74 | 5 | 100.5 ± 5.0 |
39 | 2.230 | 12.25 | 25,650 | 3.8785 | 431.27 | 5 | 111.2 ± 5.6 |
56 | 2.143 | 12.50 | 26,580 | 4.0297 | 521.23 | 5 | 129.3 ± 6.4 |