Isotopic analyses of plutonium and low-enriched uranium mixtures with particle sizes of mm were performed using thermal ionization mass spectrometry with a continuous heating method to verify its effectiveness for the accurate analysis of minor isotopes without sample pretreatment. The mixed particles used in this study were prepared from a mixed solution of plutonium (SRM 947) and uranium (U010, 235U 1% enriched) reference materials. | Accurate determination of minor isotope ratios in individual plutoniumeuranium mixed particles by thermal ionization mass spectrometry
