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

机译:使用SEM-TIMS对NUSIMEP-6铀颗粒进行同位素分析

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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 and (b) was 10% and 1%, respectively, which met the requirements for qalification for the NetWork of Analytical Laboratories (NWAL).
机译:使用热电离质谱结合扫描电子显微镜(SEM-TIMS)进行同位素分析,以确定第六次核签名实验室间测量评估程序(NUSIMEP-6)样品中微粒中所含铀的同位素比。对含铀的微颗粒进行了能量色散X射线光谱(EDS)的元素分析,这些颗粒被转移到rh丝中,使用SEM中的微操纵系统进行TIMS装载。利用多离子计数器系统同时检测铀的四个同位素的离子信号。通过使用参考材料进行括号内校正得到的铀的同位素比与标准值具有极好的一致性。和(b)的测量准确度分别为10%和1%,符合分析实验室网络(NWAL)的质量要求。

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