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Purification of neutron-irradiated tellurium targets from cross-radiocontaminants by precipitation with 1,10-phenanthroline

机译:通过1,10-菲咯啉沉淀法纯化交叉辐射污染物中的中子辐照碲靶

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摘要

Irradiated tellurium targets were purified by precipitation from 6M HCl solution using 1,10-phenanthroline. The effect of molar ratio of the reactants (initial 1,10-phenanthroline:Te molar ratio) on the precipitation yield of radiotellurium was studied. It was found that, >99% of radiotellurium has been taken up by the precipitate formed with the initial 2 phenanthroline:lTe molar ratio along with different decontamination ratios from the other cross-radiocontaminants; ≥99.9% of ~(65)Zn, 97.7 ± 1.2% of ~(75)Se, ≥99.9% ~(110m)Ag, and 95.4 ±2.5% of ~(124)Sb. Traces of ~(51)Cr, ~(54)Mn, ~(59)Fe, and ~(60)Co have been detected only in the supernatant after the precipitation process. Un-irradiated tellurium was precipitated with 1,10-phenanthroline under the same conditions with the initial 2phenanthroline:lTe molar ratio and, then, the precipitate formed was characterized by IR spectroscopy and thermal analysis. The most probable chemical composition of this precipitate was [Te(phen)2Cl4]·3.4H2O.
机译:通过使用1,10-菲咯啉从6M HCl溶液中沉淀纯化辐照的碲靶。研究了反应物的摩尔比(初始的1,10-菲咯啉:Te摩尔比)对放射性碲沉淀率的影响。发现,最初的2菲咯啉:1Te摩尔比以及与其他交叉放射性污染物不同的去污率所形成的沉淀物已吸收了超过99%的放射性碲。 〜(65)Zn的≥99.9%,〜(75)Se的97.7±1.2%,〜(110m)Ag的≥99.9%和〜(124)Sb的95.4±2.5%。在沉淀过程之后,仅在上清液中检测到痕量的〜(51)Cr,〜(54)Mn,〜(59)Fe和〜(60)Co。在相同的条件下,以初始的2菲咯啉∶1Te摩尔比,在未辐照的碲条件下用1,10-菲咯啉沉淀,然后通过红外光谱和热分析对形成的沉淀进行表征。该沉淀物最可能的化学组成是[Te(phen)2Cl4]·3.4H2O。

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