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- W4361270531 abstract "This paper describes preparing radiopure molybdenum trioxide powder enriched with Mo-100 isotope for the AMoRE-II experiment. AMoRE-II, the second phase of the AMoRE experiments, will search for the neutrinoless double-beta decay (0νDBD) of the 100 Mo isotope using over 100 kg of 100 Mo embedded in 200 kg of ultra-pure Li 2 100 MoO 4 bolometric crystals. Efficient purification technology was developed and adapted to purify 100 MoO 3 powder with a 5 kg per month production capacity. Based on the ICP-MS analysis of purified powder, the 232 Th and 238 U were reduced to <9.4 μBq/kg and <50 μBq/kg, respectively. The concentrations of potassium, transition metals, and heavy metals were lower than 1 ppm. HPGe counting confirmed the reduction of progenies from the 232 Th and 238 U decay chains, reporting upper limits of <27 μBq/kg for 228 Ac and <16 μBq/kg for 228 Th. The 226 Ra activity was acceptable at 110 ± 30 μBq/kg. In the last 3 years, 100 kg of pure 100 MoO 3 powder was produced. The production yield for the final purified product was above 90%, while irrecoverable losses were under 1.5%, and all by-products could be recycled further." @default.
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- W4361270531 date "2023-03-30" @default.
- W4361270531 modified "2023-10-01" @default.
- W4361270531 title "Preparation of low-radioactive high-purity enriched 100MoO3 powder for AMoRE-II experiment" @default.
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- W4361270531 doi "https://doi.org/10.3389/fphy.2023.1142136" @default.
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