| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
More than Five Percent Ionization Efficiency by Cavity Source Thermal Ionization Mass Spectrometry for Uranium Subnanogram Amounts
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| Autores: |
Trinquier, Anne
Maden, Colin
Faure, Anne-laure
Hubert, Amélie
Pointurier, Fabien
Bourdon, Bernard
Schönbächler, Maria
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| Data: |
2019-05
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| Ano: |
2019
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| Resumo: |
Numerous applications require the precise analysis of U isotope relative enrichment in sample amounts in the sub-nanogram to picogram range, among those are nuclear forensics, nuclear safeguards, environmental survey and geosciences. However, conven-tional thermal ionization mass spectrometry (TIMS) yields U combined ionization and transmission efficiencies (i.e ratio of ions detected to sample atoms loaded) less than 0.1 or 2% depending on the loading protocol, motivating the development of sources capable of enhancing ionization. The new prototype cavity source TIMS at ETH offers improvements from 4 to 15 times in com-bined ionization and transmission efficiency compared to conventional TIMS, yielding up to 5.6 % combined efficiency. Uranium isotope ratios have been determined on reference standards in the 100 pg range bound to ion-exchange or extraction resin beads. For natural U standards, n(235U)/n(238U) ratios are measured to relative external precisions of 0.5 to 1.0 % (2RSD, 2<n<11, conven-tional source) or 2.0 % (2RSD, n=6, cavity source) and accuracies of 0.2 to 0.7 % (conventional source) or 0.4-0.9 % (cavity source). Meanwhile, n(234U)/n(238U) ratios are determined to relative external precisions of 1.7 to 3.6 % (2RSD, 2<n<11, conven-tional source) or 5.6 % (2RSD, n=6, cavity source) and accuracies of 0.1 to 2.5% (conventional source) or 0.5 to 8.3% (cavity source), which would benefit further from in-run organic interference and peak tailing corrections.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00489/60037/63304.pdf
DOI:10.1021/acs.analchem.9b00849
https://archimer.ifremer.fr/doc/00489/60037/
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| Editor: |
American Chemical Society (ACS)
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| Formato: |
application/pdf
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| Fonte: |
Analytical Chemistry (0003-2700) (American Chemical Society (ACS)), 2019-05 , Vol. 91 , N. 9 , P. 6190-6199
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| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
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