Table 1. 226Ra contents and radon exhalation rates of the study area.
| Detector code | Soil types | Corrected track density ρ (tracks.cm −2) | Effective radium content (Bq.kg −1) | Exhalation rates | ||
|---|---|---|---|---|---|---|
| Mass exhalation (Bq.kg −1d −1) Ex (M) ×10 −7 | Surface exhalation (Bq.m −2d −1) Ex (S) ×10 −6 | Alpha index I α | ||||
| SI-1 | Silt | 90.00 | 0.99 | 0.55 | 1.15 | 0.009 |
| CL-2 | Clay | 133.30 | 1.47 | 0.82 | 1.72 | 0.014 |
| CL-3 | Clay | 120.00 | 1.32 | 0.74 | 1.55 | 0.013 |
| SA- 4 | Sand | 30.00 | 0.33 | 0.18 | 0.38 | 0.003 |
| SI- 5 | Silt | 80.00 | 0.88 | 0.49 | 1.03 | 0.008 |
| SA- 6 | Sand | 36.70 | 0.40 | 0.22 | 0.46 | 0.004 |
| SA- 7 | Sand | 43.30 | 0.48 | 0.27 | 0.57 | 0.004 |
| SA- 8 | Sand | 50.00 | 0.55 | 0.31 | 0.65 | 0.005 |
| CL- 9 | Clay | 116.70 | 1.28 | 0.72 | 1.51 | 0.013 |
| CL-10 | Clay | 110.00 | 1.21 | 0.68 | 1.43 | 0.012 |
| SI- 11 | Silt | 73.30 | 0.81 | 0.45 | 0.95 | 0.008 |
| SI- 12 | Silt | 66.70 | 0.73 | 0.41 | 0.86 | 0.007 |
| Min. | - | 30.00 | 0.33 | 0.18 | 0.38 | 0.003 |
| Max. | - | 133.30 | 1.47 | 0.82 | 1.72 | 0.014 |
| Mean | - | 79.20 | 0.87 | 0.48 | 1.02 | 0.008 |
| SD | - | 33.70 | 0.37 | 0.21 | 0.44 | 0.004 |