Typical uncertainty sources encountered in (n, xn) measurements are tabulated with special emphasis on shapes of correlations. The notation Expi refers to different datasets from the same laboratory.
|Unc. source||Cor(Expi, Expi)||Cor(Expi, Expj) i ≠ j|
|Timing-spread||From TOF →Eout transformation||≠0 for same facility/detector|
|Neutron-production target||Full||≠0 for same facility|
|Neutron-flux monitoring||Gaussian||≠0 for same facility/detector|
|Sample||Full||≠0 for similar target/methods|
|Geometric effects||Full||≠0 for same facility|
|Attenuation & multiple scatt.||Gaussian||Facility/methods dependent|
|Standards & references||From libraries||From libraries|
|Detector efficiency (neutrons)||Gaussian||Depends on efficiency determination|
|Detector efficiency (γ rays)||Full||Depends on efficiency determination|
|Extracting yields||Gaussian||≠0 for same facility/detector|
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