Abstract
A simple and inexpensive method for the separation of medically useful no-carrier-added (nca) iodine radionuclides from bulk amounts of irradiated tellurium dioxide (TeO 2) target was developed. The β − emitting 131I radionuclide, produced by the decay of 131Te through the natTe(n, γ) 131Te nuclear reaction, was used for standardization of the radiochemical separation procedure. The radiochemical separation was performed by precipitation followed by column (activated charcoal) chromatography. Quantitative post-irradiation recovery of the TeO 2 target material (98–99%), in a form suitable for reuse in future irradiations, was achieved. The overall radiochemical yield for the complete separation of 131I was 75–85% ( n=8). The separated nca 131I was of high, ∼99%, radionuclidic and radiochemical purities and did not contain detectable amounts of the target material. This method can be adopted for the radiochemical separation of other different iodine radionuclides produced from tellurium matrices through cyclotron as well as reactor irradiation.
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