Status report on AMS Measurements of Plutonium Isotopes using the 1MV Tandetron Accelerator at IFIN-HH

Dr Doru Gheorghe Pacesila1, PhD Iuliana Stanciu1,2, Dr Mihaela Enachescu1, Dr Alexandru Razvan Petre1, Dr Marian Virgolici1, PhD Andreea Serban1,3, Dr Florin Albota1, Mr Ionuz Erhan1, Dr Viorel Fugaru1, PhD Decebal Iancu1,3, Dr Vasile Mosu1

1Horia Hulubei National Institute For R&d In Physics And Nuclear Engineering (IFIN-HH), Magurele, Romania, 2Physik Department E68, Technische Universität München, München, Germany, 3Faculty of Physics, University of Bucharest, Bucharest, Romania

The Accelerator Mass Spectrometry is the most sensitive measurement method that allows us to determine 239, 240, 244Pu radioisotopes from environmental samples with extremely low isotopic concentrations. By measuring Plutonium isotopes, we focus our research activity on two main directions, monitorization of environmental nuclear pollution and nuclear astrophysics.
This report gives an overview regarding the progress that was made in the determination of Plutonium isotopes at IFIN-HH, and it starts with the studies performed for the transport and measurement of actinides using the 1MV Tandetron Accelerator. The 238U and 232Th isotopes were used as pilot beams for the determination of ion transport parameters, after which the isotopic ratios of 239Pu/242Pu, 240Pu/242Pu and 244Pu/242Pu were measured by using the new Plutonium Standard ColPuS. The results obtained for the isotopic ratios agrees with the consensus values of the standard reported in [B.A. Dittmann, et al., ColPuS, A new multi-isotope plutonium standard for Accelerator Mass Spectrometry, Nucl. Instr. Meth. B 438 (2019) 189–192]. In addition, the radiochemical separation recoveries of Uranium and Thorium using UTEVA and TEVA resins are presented, for this purpose being used an Agilent ICP-MS system (Inductively Coupled Plasma Mass Spectrometry).
Finally, it is provided a short overview of the molecular interferences challenges that are encountered when measuring Plutonium isotopes.


The team has research in accelerator mass spectrometry field. At the 1MV accelerator, the team conducted experiments in the field of radiocarbon dating and geology using the isotopes 14C, 10Be and 26Al, but also in the astroparticle physics using 239,240,242 and 244Pu isotopes. The team measured for the first time on the 1MV Tandetron accelerator uranium and plutonium isotopes.”

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Nov 08 - 19 2021