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Abstract  

The seconds living mercury isotopes have been isolated from nuclear reaction products arising in the bombardment of 147Sm target with 40Ar ions at the U-400 cyclotron of JINR-Dubna.

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Abstract  

An isotope of element 106, namely263106, detected by its spontaneous fission, has been chemically isolated by thermochromatography of oxochlorides. The last one has been compared with short- and long-lived isotopes of Mo and W. Two chemical species were observed, presumably MO2Cl2 and MOCl4 (M=Mo,W). A kinetic dependence of these two species has been discussed and a chemical form [106]O2Cl2 has been described for the registered atoms of element 106.

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Abstract  

For the first time the chemical identification of element 106 was accomplished. The Gas-thermochromatographic experiments with an oxochloride of element 106 are described. Reproducible zones of tracks of fission fragments were observed in the temperature region of 150–250°C. The chemical behavior of element 106 oxochloride is similar to that of the tungsten compound.

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Abstract  

Volatile hexafluoroacetylacetonates of hafnium, ytterbium, scandium, as well as scandium trifluoroacetylacetonate and acetylacetonate have been obtained by interaction of -diketone vapours with radionuclides formed in a cyclotron in on-line operation. The application of volatile -diketonates for transport and separation of the short-life isotopes of metallic elements has been shown.

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Abstract  

Volatile hexafluoroacetylacetonates of mendelevium and daughter fermium were first obtained by the interaction of hexafluoroacetylacetone with256Md radionuclide formed in the cyclotron under on-line conditions as well as by the heterophase exchange of ligands. Thermochromatographic behaviour of the complexes synthesized was studied in a flow of a carrier-gas saturated with ligand vapours.

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Abstract  

On-line chemistry studies of short-lived isotopes of Os and Re, as homologs of 108 (Hs) and 107 (Bh), respectively, produced in the nuclear reactions at the (LNR, Dubna) cyclotron have been carried out. It was shown, that Os and Re are not sorbed on cation exchangers, but very strongly sorbed on anion exchangers from diluted HCl solutions. Re is also retained by a TOPO containing sorbent and may be separated from Os. The possibilities of chemical species and oxidation states investigation of short-lived transactinide elements by continuous chromatography have been shown.

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Journal of Radioanalytical and Nuclear Chemistry
Authors:
B. Kubica
,
Z. Szeglowski
,
D. Thi Lien
,
L. Guseva
,
S. Timokhin
,
G. Thikhomirova
, and
A. Yakushev

Abstract  

An ion-exchange system is described for the separation of short-lived isotopes.

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Abstract  

Ion-exchange behavior of Re and Os as homolgs of Bh and Hs, respectively, has been studied in the sulfuric acid media. The distribution coefficients of 183Re and 185Os as well as of other radionuclides between Dowex-50 and H2SO4 solutions were determined as a function of the acid concentration. It was shown, that cation-exchange column may be used for the separation of Os, Re and W from elements of III group, whereas anion-exchange column for their concentration from diluted sulfuric acid solutions. The 0.05M H2SO4 was used for continuous on-line separation of short-lived Os isotopes produced in the nuclear reactions: nat.Dy(20Ne, xn)Os. Radionuclides of Os, Re and W were strongly sorbed on anion-exchange column only.

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