Table 1.
Typical uncertainty sources encountered in absolute and ratio liquid-scintillator measurements of are listed, along with realistic ranges of estimates that can be assumed if none are provided for a particular measurement. Also, off-diagonal correlation coefficients for each uncertainty source (for the same and different experiments) are roughly estimated. We implicitly assume that the typical tanks have high or similar detector efficiencies of ∼80% which is indeed often the case. The correlation functions are defined in reference [62].
Unc. | Absolute (%) | Ratio (%) | Cor(Expi) | Cor(Expi,Expj) |
---|---|---|---|---|
δc | Must be provided | Must be provided (δc & δc m ) | Diagonal | None |
δcDG | 0.1 | 0.12 | Full | Full |
δb | 0.15 | 0.5 | Gaussian | 0.2 for same n source |
0 otherwise | ||||
δcff | – | 0.22 (high α-activity sample) | Gaussian | 0.2 |
- | 0.15 (low α-activity sample) | |||
δcFE | 0.1 | – | Gaussian | 0.2 |
δω | see Table 3 | see Table 3 | 0.9 | 0.9 (same method & isot.) |
0.1 (different isotope) | ||||
δτ | 0.1 | 0.08 | Full | Low (∼0.2) |
δεγ + δεc | 0.2 | N/A | Gaussian | Gaussian |
δχ | 0.23 | 0.16 | Gaussian | Full (same Einc) |
0.5 (2nd-chance fission) | Gaussian (different Einc) | |||
δLn | 0.2 | N/A | Full | 0.5 |
δa | N/A (isotropic) | 0.01–0.3 | 0.8–1.0 | 0.6 |
0.5 at 2nd c.f. and > 10 MeV | ||||
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N/A | From libraries/reference | Full | Full |
δd | N/A (point source) | 0.1–0.3 | Full | 0.8–0.9 (not corrected) |
δds/m | N/A | 0.05 | Full | None |
ΔEinc | – | Estimate from similar facilities | Full in | 0 |
at the same Einc | Einc space |
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