Table 2
An estimated range of unc. for specific unc. sources is listed for absolute, absolute clean ratio and absolute indirect ratio data. The unc. for shape data of the same kind are analogous except for δN which is 0%.
| Unc. source | Absolute | Absolute clean ratio | Absolute indirect ratio |
|---|---|---|---|
| Sample mass | >1% | Both samples | Both samples |
| Counting statistics | Sample & measurement time-dependent | Both, combined | Both samples |
| Attenuation | 0.2%–2% | 0.02%–0.2% | 0.2%–2% |
| Detector efficiency | 1%–2% | 0–0.3% | 1%–2%, 0.5%–1% |
| FF angular distribution | ≈ 0.1% | Less than absolute | ≈0.1% |
| Background | 0.2–>10% | 0.2–>10% | 0.2–>10% |
| Energy unc. | 1%, 1–3 ns | Combined | Both detectors |
| Neutron flux | >1% | Cancels or small | Cancels or small |
| Multiple scattering | 0.2%–1% | Less than absolute | 0.2%–1% |
| Impurities in the sample | Sample-dependent | Both samples | Both samples |
| Dead time | >0.1% | Both combined | Both detectors |
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