 |
| Titel |
Overview of Uranium Isotopic Reference Materials at IRMM |
| VerfasserIn |
Stephan Richter, Heinz Kuehn, Adolfo Alonso-Munoz, Yetunde Aregbe, Roger Eykens, Ulf Jacobsson, Andre Verbruggen, Roger Wellum |
| Konferenz |
EGU General Assembly 2010
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250038973
|
|
|
|
|
|
| Zusammenfassung |
| For the validation of mass spectrometric measurement procedures and for calibration of
detector systems, suitable isotope reference materials are needed. IRMM is a well recognized
provider for nuclear isotope reference materials to the nuclear industry and nuclear
safeguards authorities, which can also be used for geological applications. This poster
provides an overview of new synthetic uranium isotopic reference materials prepared and
certified at IRMM during the recent 5 years. These materials are synthetic isotope reference
materials prepared based on proven methods of purifying and gravimetrically mixing highly
enriched oxides.
Firstly, the double spike IRMM-3636 with a 233U/236U ratio of 1:1 was prepared which
allows internal mass fractionation correction for high precision 235U/238U ratio
measurements. The 234U abundance of this double spike material is low enough to allow an
accurate and precise correction of 234U/238U ratios, even for measurements of close to
equilibrium uranium samples. The double spike IRMM-3636 is offered in 3 concentrations:
1mg/g, 0.1mg/g and 0.005mg/g.
Secondly, the 236U single spike IRMM-3660 was prepared and is offered in 3
concentrations: 1mg/g, 0.1mg/g and 0.01mg/g.
Thirdly, a quad-isotope reference material, IRMM-3101, has been prepared which
is characterized by 233U/235U/236U/238U=1/1/1/1. This material is useful for
checking Faraday cup efficiencies and inter-calibration of MIC (multiple ion counting)
detectors. The quad-IRM is offered in 3 concentrations: 1mg/g, 0.1mg/g and 0.01mg/g. |
|
|
|
|
|
|