The Experts below are selected from a list of 2244 Experts worldwide ranked by ideXlab platform
Takaumi Kimura - One of the best experts on this subject based on the ideXlab platform.
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isotope ratio analysis of individual sub micrometer plutonium particles with inductively coupled plasma mass spectrometry
Talanta, 2010Co-Authors: Fumitaka Esaka, Daisuke Suzuki, Yutaka Miyamoto, Masaaki Magara, Chigyu Lee, Takaumi KimuraAbstract:Abstract Information on plutonium isotope ratios in individual particles is of great importance for nuclear safeguards, nuclear forensics and so on. Although secondary ion mass spectrometry (SIMS) is successfully utilized for the analysis of individual uranium particles, the isobaric interference of americium-241 to plutonium-241 makes difficult to obtain accurate isotope ratios in individual plutonium particles. In the present work, an analytical technique by a combination of chemical separation and inductively coupled plasma mass spectrometry (ICP-MS) is developed and applied to isotope ratio analysis of individual sub-micrometer plutonium particles. The ICP-MS results for individual plutonium particles prepared from a standard reference material (NBL SRM-947) indicate that the use of a desolvation system for sample introduction improves the precision of isotope ratios. In addition, the accuracy of the 241 Pu/ 239 Pu isotope ratio is much improved, owing to the chemical separation of plutonium and americium. In conclusion, the performance of the proposed ICP-MS technique is sufficient for the analysis of individual plutonium particles.
Fumitaka Esaka - One of the best experts on this subject based on the ideXlab platform.
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direct isotope ratio analysis of individual uranium plutonium mixed particles with various u pu ratios by thermal ionization mass spectrometry
Applied Radiation and Isotopes, 2015Co-Authors: Daisuke Suzuki, Fumitaka Esaka, Yutaka Miyamoto, Masaaki MagaraAbstract:Uranium and plutonium isotope ratios in individual uranium-plutonium (U-Pu) mixed particles with various U/Pu atomic ratios were analyzed without prior chemical separation by thermal ionization mass spectrometry (TIMS). Prior to measurement, micron-sized particles with U/Pu ratios of 1, 5, 10, 18, and 70 were produced from uranium and plutonium certified reference materials. In the TIMS analysis, the peaks of americium, plutonium, and uranium ion signals were successfully separated by continuously increasing the evaporation filament current. Consequently, the uranium and plutonium isotope ratios, except the (238)Pu/(239)Pu ratio, were successfully determined for the particles at all U/Pu ratios. This indicates that TIMS direct analysis allows for the measurement of individual U-Pu mixed particles without prior chemical separation.
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isotope ratio analysis of individual sub micrometer plutonium particles with inductively coupled plasma mass spectrometry
Talanta, 2010Co-Authors: Fumitaka Esaka, Daisuke Suzuki, Yutaka Miyamoto, Masaaki Magara, Chigyu Lee, Takaumi KimuraAbstract:Abstract Information on plutonium isotope ratios in individual particles is of great importance for nuclear safeguards, nuclear forensics and so on. Although secondary ion mass spectrometry (SIMS) is successfully utilized for the analysis of individual uranium particles, the isobaric interference of americium-241 to plutonium-241 makes difficult to obtain accurate isotope ratios in individual plutonium particles. In the present work, an analytical technique by a combination of chemical separation and inductively coupled plasma mass spectrometry (ICP-MS) is developed and applied to isotope ratio analysis of individual sub-micrometer plutonium particles. The ICP-MS results for individual plutonium particles prepared from a standard reference material (NBL SRM-947) indicate that the use of a desolvation system for sample introduction improves the precision of isotope ratios. In addition, the accuracy of the 241 Pu/ 239 Pu isotope ratio is much improved, owing to the chemical separation of plutonium and americium. In conclusion, the performance of the proposed ICP-MS technique is sufficient for the analysis of individual plutonium particles.
Nengbin Huang - One of the best experts on this subject based on the ideXlab platform.
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direct determination of ultra trace plutonium nanoparticles in downstream of a six stage hepa filter by inductively coupled plasma mass spectrometry a field application
Aerosol Science and Technology, 2011Co-Authors: Xiangjun Ren, Guoqing Zhou, Lihua Zhai, Longbo Liu, Guanyi Wei, Nengbin HuangAbstract:In this work, plutonium aerosol generated from a plutonium reprocessing facility is filtered by a six-stage High Efficiency Particulate Air (HEPA) filter system and analyzed in laboratory within a week. Through on-line monitoring of number concentration of particles above 10 nm by a commercial condensation particle counter and off-line monitoring of 239Pu activity concentration by 242Pu isotope dilution Inductively-Coupled Plasma Mass Spectrometry (ICP-MS), it is confirmed that the HEPA filter system works properly during the field operation. Direct determination of plutonium aerosol by two types of ICP-MS, Finnigan ELEMENT ICP-MS and Nu MC-ICP-MS, has been conducted. The results show that the detection limits of ELEMENT and Nu for plutonium concentration are 5.0 × 10−3 Bq/m3 and 5.5 × 10−4 Bq/m3, respectively. Plutonium concentrations in the filtered gas samples are on the order of 2.0 × 10−2 Bq/m3 while the blank value is 5.7 × 10−3 Bq/m3. It's discovered that some plutonium nanoparticles have penetrate...
Masaaki Magara - One of the best experts on this subject based on the ideXlab platform.
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direct isotope ratio analysis of individual uranium plutonium mixed particles with various u pu ratios by thermal ionization mass spectrometry
Applied Radiation and Isotopes, 2015Co-Authors: Daisuke Suzuki, Fumitaka Esaka, Yutaka Miyamoto, Masaaki MagaraAbstract:Uranium and plutonium isotope ratios in individual uranium-plutonium (U-Pu) mixed particles with various U/Pu atomic ratios were analyzed without prior chemical separation by thermal ionization mass spectrometry (TIMS). Prior to measurement, micron-sized particles with U/Pu ratios of 1, 5, 10, 18, and 70 were produced from uranium and plutonium certified reference materials. In the TIMS analysis, the peaks of americium, plutonium, and uranium ion signals were successfully separated by continuously increasing the evaporation filament current. Consequently, the uranium and plutonium isotope ratios, except the (238)Pu/(239)Pu ratio, were successfully determined for the particles at all U/Pu ratios. This indicates that TIMS direct analysis allows for the measurement of individual U-Pu mixed particles without prior chemical separation.
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isotope ratio analysis of individual sub micrometer plutonium particles with inductively coupled plasma mass spectrometry
Talanta, 2010Co-Authors: Fumitaka Esaka, Daisuke Suzuki, Yutaka Miyamoto, Masaaki Magara, Chigyu Lee, Takaumi KimuraAbstract:Abstract Information on plutonium isotope ratios in individual particles is of great importance for nuclear safeguards, nuclear forensics and so on. Although secondary ion mass spectrometry (SIMS) is successfully utilized for the analysis of individual uranium particles, the isobaric interference of americium-241 to plutonium-241 makes difficult to obtain accurate isotope ratios in individual plutonium particles. In the present work, an analytical technique by a combination of chemical separation and inductively coupled plasma mass spectrometry (ICP-MS) is developed and applied to isotope ratio analysis of individual sub-micrometer plutonium particles. The ICP-MS results for individual plutonium particles prepared from a standard reference material (NBL SRM-947) indicate that the use of a desolvation system for sample introduction improves the precision of isotope ratios. In addition, the accuracy of the 241 Pu/ 239 Pu isotope ratio is much improved, owing to the chemical separation of plutonium and americium. In conclusion, the performance of the proposed ICP-MS technique is sufficient for the analysis of individual plutonium particles.
Daisuke Suzuki - One of the best experts on this subject based on the ideXlab platform.
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direct isotope ratio analysis of individual uranium plutonium mixed particles with various u pu ratios by thermal ionization mass spectrometry
Applied Radiation and Isotopes, 2015Co-Authors: Daisuke Suzuki, Fumitaka Esaka, Yutaka Miyamoto, Masaaki MagaraAbstract:Uranium and plutonium isotope ratios in individual uranium-plutonium (U-Pu) mixed particles with various U/Pu atomic ratios were analyzed without prior chemical separation by thermal ionization mass spectrometry (TIMS). Prior to measurement, micron-sized particles with U/Pu ratios of 1, 5, 10, 18, and 70 were produced from uranium and plutonium certified reference materials. In the TIMS analysis, the peaks of americium, plutonium, and uranium ion signals were successfully separated by continuously increasing the evaporation filament current. Consequently, the uranium and plutonium isotope ratios, except the (238)Pu/(239)Pu ratio, were successfully determined for the particles at all U/Pu ratios. This indicates that TIMS direct analysis allows for the measurement of individual U-Pu mixed particles without prior chemical separation.
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isotope ratio analysis of individual sub micrometer plutonium particles with inductively coupled plasma mass spectrometry
Talanta, 2010Co-Authors: Fumitaka Esaka, Daisuke Suzuki, Yutaka Miyamoto, Masaaki Magara, Chigyu Lee, Takaumi KimuraAbstract:Abstract Information on plutonium isotope ratios in individual particles is of great importance for nuclear safeguards, nuclear forensics and so on. Although secondary ion mass spectrometry (SIMS) is successfully utilized for the analysis of individual uranium particles, the isobaric interference of americium-241 to plutonium-241 makes difficult to obtain accurate isotope ratios in individual plutonium particles. In the present work, an analytical technique by a combination of chemical separation and inductively coupled plasma mass spectrometry (ICP-MS) is developed and applied to isotope ratio analysis of individual sub-micrometer plutonium particles. The ICP-MS results for individual plutonium particles prepared from a standard reference material (NBL SRM-947) indicate that the use of a desolvation system for sample introduction improves the precision of isotope ratios. In addition, the accuracy of the 241 Pu/ 239 Pu isotope ratio is much improved, owing to the chemical separation of plutonium and americium. In conclusion, the performance of the proposed ICP-MS technique is sufficient for the analysis of individual plutonium particles.