Mass Spectrometry Letters

Korean Society for Mass Spectrometry (한국질량분석학회)
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Isotopic Analysis of NUSIMEP-6 Uranium Particles using SEM-TIMS

  • Park, Jong-Ho (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute) ;
  • Park, Sujin (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute) ;
  • Song, Kyuseok (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute)
  • Received : 2013.09.11
  • Accepted : 2013.09.24
  • Published : 2013.09.30
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Abstract

Isotopic analysis using thermal ionization mass spectrometry coupled with scanning electron microscopy (SEM-TIMS) was performed to determine the isotopic ratios of uranium contained in micro-particles in the 6th Nuclear Signatures Interlaboratory Measurement Evaluation Programme (NUSIMEP-6) sample. Elemental analysis by energy dispersive X-ray spectroscopy (EDS) was conducted on uranium-bearing mirco-particles, which were transferred to rhenium filaments for TIMS loading using a micromanipulation system in a SEM. A multi-ion-counter system was utilized to detect the ion signals of the four isotopes of uranium simultaneously. The isotope ratios of uranium corrected by bracketing using a reference material showed excellent agreement with the certified values. The measurement accuracy for $n(^{234}U)/n(^{238}U)$ and (b) $n(^{235}U)/n(^{238}U)$ was 10% and 1%, respectively, which met the requirements for qalification for the NetWork of Analytical Laboratories (NWAL).

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