SIMS XXI Proceedings - just published!

Sunday, March 18, 2018

Co-authored by CAMECA scientists, two articles highlight the diversity SIMS instruments applications in nuclear science and nuclear forensics. Do not hesitate to contact us if you wish to receive a copy of one or both articles.

Dynamic SIMS for materials analysis in nuclear science

Co-authored by Paula Peres, CAMECA  IMS 7f-Auto product manager, Philippe Bienvenu and Ingrid Roure from CEA Cadarache, Yves Pipol, Clotilde Gaillard, and Nathalie Moncoffre from University of Lyon, France as well as Lola Sarrasin from IRSN, France and Denis Mangin from Jean Lamour Institute, France, this article details various examples of material analyses that are of interest for nuclear science, all data were obtained on IMS 7f / IMS 7f-Auto SIMS secondary ion mass spectrometers:
  • depth profiling of the xenon and mapping of contaminants in CeO2
  • in-depth distribution of iodine in SiC using the energy filtering technique for improving the I detection limit
  • depth profiling analysis of molybdenum in UO2 using eucentric sample rotation for minimizing surface roughness development (thus improving data quality).
Published by the AVS. https://doi.org/10.1116/1.5017027

Latest improvements in isotopic uranium particle analysis by large geometry–secondary ion mass spectrometry for nuclear safeguards purposes

By P.M.L. Hedberg, N. Albert and C. Vincent (European Commission, DG Joint Research Centre-JRC), P. Peres and F. Fernandes (CAMECA)
Large geometry SIMS tools are efficiently used to analyze uranium aerosol particles from dust samples in the search for undeclared nuclear activities. Automated sample screening measurements are followed by more precise and accurate microbeam measurements of both the major and minor uranium isotopes on selected individual particles. The quality of this work is essential in order to be able to draw valuable safeguards conclusions.

This paper describes the latest developments that have been undertaken to enhance the detection limits and to reduce the uranium isotope measurement uncertainty. The measurements performed on standard uranium particles show that the new CAMECA IVAS software capabilities for isotope ratio analysis, combined with an optimized dynamic multicollector protocol, have significantly improved the 235U atom% measurement precision.

Published by the AVS. https://doi.org/10.1116/1.5016943