Radiochemical multielement neutron activation analysis of high-purity niobium with short-lived indicator radionuclides

Faix, W. G.; Caletka, R.; Kriváň, V.

doi:10.1021/ac00234a014

Cited by 19 publications

(6 citation statements)

References 28 publications

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“…There are several ˇelds of acid concentrations with relatively low values of distribution coefˇcients K d of niobium and tantalum (Fig. 4) when a Dowex 1 × 8 exchanger is used [17]. In this system trends in the K d value changing are of a different character.…”

Section: Resultsmentioning

confidence: 99%

Isocratic anion exchange separations of Group V elements

Tereshatov¹,

Bruchertseifer

Voronyuk³

et al. 2010

J Radioanal Nucl Chem

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Section: Resultsmentioning

confidence: 99%

Isocratic anion exchange separations of Group V elements

Tereshatov¹,

Bruchertseifer

Voronyuk³

et al. 2010

J Radioanal Nucl Chem

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“…The complexing behaviour of these transition metals has been investigated on ion exchange resins, see e.g. [33][34][35][36][37]. It was applied to study anionic fluoride complexes of element 104 on-line with an anion exchange resin [38].…”

Section: Choice Of the Chemical Systemmentioning

confidence: 99%

First Aqueous Chemistry with Seaborgium (Element 106)

et al. 1997

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For the first time, chemical separations of element 106 (Seaborgium, Sg) were performed in aqueous solutions. The isotopes 265 Sg and 266 Sg were produced in the 248 Cm + 22 Ne reaction at a beam energy of 121 MeV. The reaction products were continuously transported by a He(KCl)-jet to the computer-controlled liquid chromatography system ARCA. In 0.1 M HNO3/5 X ΙΟ -4 M HF, Sg was found to be eluted within 10 s from 1.6X8 mm cation-exchange columns (Aminex A6, 17.5±2 μπι) together with the hexavalent Mo-and W-ions, while hexavalent U-ions and tetravalent Zr-, Hf-, and element 104 ions were strongly retained on the column. Element 106 was detected by measuring correlated α-decays of the daughter isotopes 78-s 261 104 and 26-s 257 102. For the isotope 266 Sg, we have evidence for a spontaneous fission branch. It yields a partial spontaneousfission half-life which is in agreement with recent theoretical predictions. The chemical results show that the most stable oxidation state of Sg in aqueous solution is +6, and that like its homologs Mo and W, Sg forms neutral or anionic oxo-or oxohalide-compounds under the present condition. In these first experiments, Sg exhibits properties very characteristic of group 6 elements, and does not show U-like properties.

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“…Niobium metal is analyzed simply and quickly for metallic and nonmetallic impurities down to the lower ng/g region by glow discharge mass spectrometry (GDMS) [91]. The additional techniques of neutron activation analysis [92,93] or proton activation analysis [94] are used for verification. …”

Section: Discussionmentioning

confidence: 99%

“…There are many artificial radionuclides, but only one known natural nonradioactive isotope, 93 Nb. The electronic configuration of the ground state is 4s 2 p 6 d 3 5s 2 , which explains the existence of the oxidation states þ 2 to þ 5.…”

Section: Introductionmentioning

confidence: 99%

Niobium and Niobium Compounds

Albrecht

Cymorek

Eckert

2011

Ullmann's Encyclopedia of Industrial Chemistry

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The article contains sections titled: 1. Introduction 2. Properties 2.1. Physical Properties 2.2. Chemical Properties 3. Occurrence 4. Processing of Niobium Ores 4.1. Winning of Pyrochlore Concentrates 4.2. Treatment of Pyrochlore Concentrates 4.3. Production of Niobium Oxide from Columbites and Tantalites 4.3.1. Extraction Processes 4.3.2. Chlorination 5. Niobium Compounds 5.1. Oxides 5.2. Halides 5.3. Carbides and Hard Materials 6. Niobium Metal 6.1. Reduction of Niobium Pentoxide 6.2. Reduction of Halides 6.3. Refining 6.4. Uses 7. Ferroniobium 7.1. Production 7.2. Uses of Ferroniobium 8. Analysis 9. Economic Aspects

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Radiochemical multielement neutron activation analysis of high-purity niobium with short-lived indicator radionuclides

Cited by 19 publications

References 28 publications

Isocratic anion exchange separations of Group V elements

Isocratic anion exchange separations of Group V elements

First Aqueous Chemistry with Seaborgium (Element 106)

Niobium and Niobium Compounds

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