Chemical procedure applied for the identification of Rf/Db produced in the 48Ca +243Am reaction
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Dorothea Schumann
Summary
A chemical separation procedure for Rf/Db is described which was applied to a long-lived decay product from the nuclear fusion reaction 48Ca+ 243Am. A 1.2 mg thick 243Am target was bombarded by 247 MeV 48Ca particles. The recoiling products were collected in a thick Cu catcher for about one day and then subjected to a chemical separation procedure that included an ion exchange from dilute HF solutions. Final samples were prepared on 30 μg/cm2 thick polyethylene (PE) foils and counted in 4π-geometry for α-particles and spontaneous fission (SF) coincidences. The detector arrays were surrounded by 3He detectors to also assay prompt neutrons. Decontamination factors from actinides of about 105 were achieved. Group 6 (W) to 14 (Pb) elements as models for their heavier homologues were shown to be separated from the Rf/Db fraction with more than 90%. In eight final samples, representing a total beam dose of 3.4 × 1018 particles, 15 SF events were detected. The decay pattern points to a single component with a half-life of ≈32h, which shows a chemical behavior similar to the lighter homologues of group 4 and 5 elements.
© Oldenbourg Wissenschaftsverlag, München
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Artikel in diesem Heft
- Chemical procedure applied for the identification of Rf/Db produced in the 48Ca +243Am reaction
- Chemical speciation of Am, Cm and Eu with EDTA at high ionic strength: thermodynamics and laser fluorescence spectroscopy studies
- Complexation of Cm(III)/Eu(III) with silicates in basic solutions
- Extraction of americium and europium by CMPO-substituted adamantylcalixarenes
- Plutonium (IV) complexation with citric and alginic acids at low PuT concentrations
- Electrochemical and spectroelectrochemical behaviour of Np(VI) ions in nitric acid solutions
- Americium and curium deposition in Finland from the Chernobyl accident
- Determination of uranium concentration and burn-up of irradiated reactor fuel in contaminated areas in Belarus using uranium isotopic ratios in soil samples
