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Abstract

In order to measure uranium isotope abundances with a known and provable accuracy, it is necessary to quantify all the systematic errors of the measurement process and to establish the uncertainties. This is only possible by means of reference materials of accurately known isotopic composition. These reference materials are themselves established by measurements which are calibrated with the aid of mixtures of enriched isotopes, the isotopic enrichment of which must be accurately determined. The purpose of this paper is to describe the methods used to establish the isotopic enrichment of the isotopically enriched starting materials from which CBNM synthetic isotope mixtures are prepared. These are then used to calibrate certification measurements of large batches of Isotopic Reference Materials. Use of the approach is described in the case of 235-Uranium Isotope abundance Certified Materials for Gamma Spectrometry (EC Nuclear Reference Material 171).

Additional information

Authors: ROSMAN K J R, JRC GEEL ESTAB. (BELGIUM);LYCKE W, JRC GEEL ESTAB. (BELGIUM);DAMEN R, JRC GEEL ESTAB. (BELGIUM);HENDRICKX F, JRC GEEL ESTAB. (BELGIUM);WERZ R, JRC GEEL ESTAB. (BELGIUM);DE BIEVRE P JRC GEEL ESTAB. (BELGIUM), JRC GEEL ESTAB. (BELGIUM)
Bibliographic Reference: KARLSRUHE INTERNATIONAL CONFERENCE ON ANALYTICAL CHEMISTRY IN NUCLEAR TECHNOLOGY, KARLSRUHE (GERMANY), FEB. 15, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32023 ORA
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