Application of thermal ionisation mass spectrometry for oxygen isotope ratio measurement in Uranium Oxide
A method has been developed for the precise determination of oxygen isotope ratios in uranium oxides. Thermal Ionisation Mass spectrometry (TIMS) was used for direct measurements of n(U18 O)/n(U16 O) using the molecular species UO+. Suitable sample handling and filament preparation techniques were developed in order to obtain reproducible results and avoid oxygen contamination. The actual measurements were performed using the total evaporation method. By this technique the achieved precision for U(18)O(+)/U(16) O+ measurements were in the range of 0.04%. As the peak jump technique was also used for measurements, the results of both techniques will be discussed. The TIMS measurements are verified with comparative measurements obtained by Secondary Ion Mass Spectrometry (SIMS).
Bibliographic Reference: Oral report given at: The Finnish-Russian Radiochemistry Symposium. Held at: Helsinki (FI), 7-8 November, 2000
Record Number: 200013199 / Last updated on: 2001-03-23
Original language: en
Available languages: en