Radionuclide sequestration by metal-organic frameworks
Detection and Measurement of Radioactivity
14.7.1 Statistical Error of Radioactivity Dimension
The experience of radioactive substances is normally calculated indirectly. Which means the amount of the particles or photons counted into the detector is proportional into the radioactivity, the amount of decompositions in a product of the time (see Section 4.1.2 ). As previously mentioned in area 4.1.1 , radioactive decay is a analytical process, so repeated measurements give a analytical circulation around a value that is mean. The statistical error of the measurements can be determined accurately on the basis of the statistical laws.
The analytical laws and regulations postulate that because the calculated counts (letter) enhance, the absolute mistake (О”N) also increases. The error that is relative), however, decreases. Whenever N is commonly infinity, the general mistake tends become zero.
For adequately big values, the likelihood circulation acquired for the calculated values and PoissonвЂ™s likelihood circulation function is the identical ( Fig. 14.12 ).