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  • P-ISSN 2233-4203
  • E-ISSN 2093-8950

Isotopic Analysis of NUSIMEP-6 Uranium Particles using SEM-TIMS

Mass Spectrometry Letters / Mass Spectrometry Letters, (P)2233-4203; (E)2093-8950
2013, v.4 no.3, pp.51-54
Park Jong-Ho (Korea Atomic Energy Research Institute)
Park Sujin (Korea Atomic Energy Research Institute)
Song Kyuseok (Korea Atomic Energy Research Institute)
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Isotopic analysis using thermal ionization mass spectrometry coupled with scanning electron microscopy (SEMTIMS)was performed to determine the isotopic ratios of uranium contained in micro-particles in the 6th Nuclear SignaturesInterlaboratory Measurement Evaluation Programme (NUSIMEP-6) sample. Elemental analysis by energy dispersive X-rayspectroscopy (EDS) was conducted on uranium-bearing mirco-particles, which were transferred to rhenium filaments for TIMSloading using a micromanipulation system in a SEM. A multi-ion-counter system was utilized to detect the ion signals of thefour isotopes of uranium simultaneously. The isotope ratios of uranium corrected by bracketing using a reference materialshowed excellent agreement with the certified values. The measurement accuracy for n(234U)/n(238U) and (b) n(235U)/n(238U) was10% and 1%, respectively, which met the requirements for qualification for the NetWork of Analytical Laboratories (NWAL).

Uranium, SEM-TIMS, Particle Analysis, Isotopic Analysis, Safeguards



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Mass Spectrometry Letters