Abstract
The measurement of the neutron field relative distribution can significantly improve the accuracy of PGNAA, and can broaden the scope of PGNAA toward large samples. For this purpose, according to the properties and characteristics of neutron tomography, a new method to calculate the neutron field relative distribution inside the objects based on neutron tomography has been proposed. PGNAA technique combined with neutron field relative distribution was used to calculate element content as verification method. The results show that the PGNAA measurement accuracy for large samples was significantly improved, which proves that the measurement method of the neutron field relative distribution is accurate and reliable.
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