GammaVision
®
v7 (A66-BW) 783620H / 1013
where:
σ
count
2
σ
σ
σ
σ
eff geo sys adl s
2
2
2
σ
nor
2
σ
rsum
2
σ
abs
σ
σ
nuc
2
2
2
2
= counting uncertainty estimate (Section 6.3.4). If PBC is enabled, this term includes the PBC uncertainty calculated per Section 6.12.12.
= additional normally distributed uncertainty estimate (Section 6.12.3)
= random summing uncertainty estimate (Section 6.12.4)
= absorption uncertainty estimate (Section 6.12.5)
= nuclide uncertainty estimate (Section 6.12.6)
= efficiency uncertainty estimate (Section 6.12.7)
= geometry uncertainty estimate (Section 6.12.8)
= systematic (uniformly distributed) uncertainty estimate (Section 6.12.9)
= additional user-defined uncertainty factor (Section 6.12.10)
= sample size uncertainty (Section 6.12.11)
All components of uncertainty estimates except
σ
uni
are computed at the 1-sigma level. The uncertainty estimate for a uniformly distributed error is used at the full range. If a correction factor is not used, the uncertainty estimate is zero for that component.
6.12.2. Counting Uncertainty Estimate
This is discussed in Section 6.3.4.
6.12.3. Additional Normally Distributed Uncertainty Estimate
Input nor
is obtained based on the Random setting in the Additional Error section of the
Analysis tab.
(93)
where:
σ
2 nor
Input nor
= variance of additional normally distributed uncertainty (% 1 sigma)
= user input for normally distributed uncertainty (% 1 sigma)
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