| Regions | Assay-1 | Assay-2 | ||
| Lower Limit (keV) | Upper Limit (keV) | Lower Limit (keV) | Upper Limit (keV) | |
| A | 0 | 2000 | 130 | 700 |
| B | 0 | 2000 | 150 | 1800 |
| C | 0 | 2000 | 0 | 2000 |