Preparation of neutron activated concrete reference material for gamma-ray spectrometry measurement.

Neutron activated concrete reference material for measurement of residual radioactivity by gamma-ray spectrometry has been prepared. The main radionuclides were ⁶⁰Co, ¹⁵²Eu, ⁵⁴Mn, ¹⁵⁴Eu and ¹³⁴Cs. One-way ANOVA homogeneity test has shown that the samples are homogeneous. The activity concentrations of ⁵⁴Mn, ⁵⁹Fe, ¹⁵⁴Eu and ¹³⁴Cs were relatively low; only ⁶⁰Co activity concentration was found to be higher therefor it was considered as the main target isotope. The prepared sample can be used as a tool to prove compliance to radiation protection and environmental regulations during decommissioning of cyclotron buildings or other irradiation facilities that produce residual radioactivity. [ABSTRACT FROM AUTHOR]