Matrix-assisted production of actinide molecular anions for AMS

Ultrasensitive detection of 244Pu in environmental samples by accelerator mass spectrometry

“…This behavior, of iron oxide mixed with niobium, was also observed in ref. 48 where it was stated that this type of mixture has low sputtering rates and to measure efficiently in about 2 hours high Cs+ fluxes are needed.…”

“…This behavior, of iron oxide mixed with niobium, was also observed in ref. 48 where it was stated that this type of mixture has low sputtering Regarding the concentration of 244 Pu, the results showed levels of hundreds of atto-grams per gram of sediment, and for the Pacic Ocean sediment the level is of the order of several tens of atto-grams per gram. An explanation could lie in the fact that during the nuclear test, the atomic bombs exploded on the Bikini Atoll island, while the Pacic Ocean received plutonium from several sources, such as nuclear tests or local accidents; therefore the plutonium was diluted by the water body and later deposited on the bottom of the ocean.…”

Developing Accelerator Mass Spectrometry Capabilities for Anthropogenic Radionuclide Analysis to Extend the Set of Oceanographic Tracers

“…− , and AnF 4 − molecular anions of the actinides U, Np, Pu, and Am. This effort has resulted in a novel isobar analysis technique based on the element specific AnF 4 − /AnF 5 − ratios that is capable of characterizing the elemental composition of the produced mass 236 in the prospective spike material (Zhao and Francisco, 2022;Wiederin, A. et al, in preparation).…”