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Uncertainty budget for the half-life determined by HPGe at NPL using the summed net areas of the 238 keV, 241 keV, and 583 keV full-energy peaks.
| Component | uA/A/% | n | Propagation Factor | uT1/2/T1/2/% |
|---|---|---|---|---|
| Standard deviation of the residuals | 0.18 | 221 | 0.038 | 0.0066 |
| Fitting | 0.30 | 1 | 0.399 | 0.12 |
| Stability | 0.10 | 1 | 0.399 | 0.040 |
| Dead time/Pile-up | 0.10 | 1 | 0.399 | 0.040 |
| Background correction | 0.0050 | 1 | 0.399 | 0.0020 |
| 228Th correction | 0.013 | 1 | 0.399 | 0.0051 |
|
| ||||
| Combined standard uncertainty, uc | 0.13 | |||
