k 0-NAA for determination of REE in reference materials of ore sources
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Multielements, including some rare earth elements, have been determined by k 0-NAA in three types of ore reference materials from Australia Nuclear Science and Technology Organization. The samples were irradiated in China Mianyang Research Reactor. High purity iron wire and Zr foil were used to monitor the neutron spectrum parameters (f, φ th) at irradiation positions. Uranium fission interferences for Nd, Ce, La were determined and corrected for by Ik0 method. The effective interaction depth was employed to normalize efficiencies at different counting positions. The results are in good agreement with the values reported other laboratories.
KeywordsNeutron activation analysis Rare earth elements Effective interaction depth Fission interference
This work was supported by the National Natural Science Foundation of China (No. 11275276). This study was made possible by supports of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan. Dr. John Bennett (ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia) was acknowledged for providing the Reference Materials.
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