Community Research and Development Information Service - CORDIS

Abstract

Natural uranium samples may have small variations in their isotopic composition. These variations may be correlated to the geographic origin of the sample. These small differences may be due to natural isotopic fractionation, to nuclear reactions of the uranium isotopes or to contamination by non natural uranium. Only the accurate determination of the isotope abundance ratios allow detection of these small differences, which may help to distinguish between natural samples from different origins.

A measurement procedure using 2 different types of mass spectrometers was developed. The n(uranium-235)/n(uranium-238) isotope ratio is measured by a gas source mass spectrometer and the other isotopic ratios are measured by thermal ionization mass spectrometry. The measurement uncertainties achieved allow identification of samples of common origin and distinguish between samples of different origin. .

Additional information

Authors: OVASKAINEN R, JRC Geel (BE);DE BOLLE W, JRC Geel (BE);MAYER K, JRC Geel (BE);DE BIEVRE P, JRC Geel (BE)
Bibliographic Reference: Paper presented: The 9th Nordic Conference on Mass Spectrometry, Turku (FI), August, 1995
Availability: Available from (1) as Paper EN 39138 ORA
Record Number: 199512037 / Last updated on: 1996-01-15
Category: PUBLICATION
Original language: en
Available languages: en