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Anion-exchange behavior of the group-6 elements in HF/HNO$$_{3}$$ mixed solutions; Towards the study of ion-exchange behavior of $$^{106}$$Sg

Liang, X.; Li, Z.; Tsukada, Kazuaki ; Toyoshima, Atsushi; Asai, Masato ; Sato, Tetsuya  ; Sato, Nozomi; Kikuchi, Takahiro; Kaneya, Yusuke; Nagame, Yuichiro

Anion-exchange behavior of the group-6 elements, W and Mo, in HF and HNO$$_{3}$$ mixed solutions has been studied by a batch method using the carrier-free radiotracers $$^{rm 181}$$W and $$^{rm 93m}$$Mo. The long-lived isotope $$^{181}$$W and the short-lived isotope $$^{rm 93m}$$Mo were produced in the $$^{181}$$Ta(p,n) and the $$^{93}$$Nb(p,n) reaction at the JAEA tandem accelerator, respectively. The solutions containing $$^{rm 181}$$W or $$^{rm 93m}$$Mo were mixed with anion exchange resin. Radioactivities of the solution were assayed for $$gamma$$-ray spectrometry, and then distribution coefficients (K$$_{d}$$s) of these elements were determined. It was found that the K$$_{d}$$ values of W depend strongly on the concentration of HF, while those of Mo are almost constant as a function of [HF] under the given conditions.

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