Journal of Nuclear and Radiochemical Sciences
Online ISSN : 1883-5813
Print ISSN : 1345-4749
ISSN-L : 1345-4749
Anion-exchange Behavior of Rf in HCl and HNO3 Solutions
H. HabaK. TsukadaM. AsaiS. GotoA. ToyoshimaI. NishinakaK. AkiyamaM. HirataS. IchikawaY. NagameY. ShojiM. ShigekawaT. KoikeM. IwasakiA. ShinoharaT. KanekoT. MaruyamaS. OnoH. KudoY. OuraK. SuekiH. NakaharaM. SakamaA. YokoyamaJ. V. KratzM. SchädelW. Brüchle
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2002 Volume 3 Issue 1 Pages 143-146


A short review is given on our current anion-exchange studies of element 104, rutherfordium (Rf), in HCl and HNO3 solutions. The distribution coefficients of the Rf homologues Zr, Hf, and Th (IV), and Pu (IV) on an anion-exchange resin were measured in 1.0-11.5 M HCl and 1.1-13.1 M HNO3 with a batch method using the radiotracers 88Zr, 175Hf, 234Th, and 237Pu. In experiments for the short-lived 261Rf, the isotopes 85Zr, 169Hf, and 169Rf were produced in the 18O-induced reactions on natGe, 248Gd, and 248Cm targets, respectively, and their anion-exchange behavior in 4.0-11.5 M HCl and 8.0 M HNO3 was investigated using the Automated Ion-exchange separation apparatus coupled with the Detection system for Alpha spectroscopy (AIDA). In the HCl system, the percent adsorption of Rf on the anion-exchange resin increases steeply with increasing HCl concentration from 7.0 M to 11.5 M. This adsorption behavior is similar to that of the group-4 elements Zr and Hf, and is quite different from that of the pseudo-homologue Th (IV). The percent adsorption decreases in the order Rf>Zr>Hf. In the HNO3 system, Rf behaves like Zr and Hf in 8.0 M HNO3 but not like Pu (IV) and Th (IV), implying the formation of cationic or neutral species.

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