• Nuclear Engineering and Technology
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• v.55 no.9
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• pp.3202-3205
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• 2023

The k₀-standardization neutron activation analysis method has successfully determined the mass fraction of elements of interest using around a hundred analytical radionuclides. However, several very short-lived nuclides with half-life less than 100 s have not been used at Dalat research reactor. One of the reasons is that the values of k₀-factors of these nuclides are significantly different. Therefore, this work focused on re-determination and evaluation of k₀-factors of very short-lived nuclides ¹¹⁰Ag (T_1/2 = 24 s) and ^46mSc (T_1/2 = 18.75 s). The results of determination of the short-lived nuclides revealed that k₀-factor of ¹¹⁰Ag is significantly difference between the existing data and the obtained results in this work. The evaluation of the k₀-factors was done by using the obtained results for application of k₀-NAA for NIST-1566b and NIST-2711A standard reference materials.