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Preparation of low-radioactive high-purity enriched 100MoO3 powder for AMoRE-II experiment

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Title
Preparation of low-radioactive high-purity enriched 100MoO3 powder for AMoRE-II experiment
Author(s)
Hyojin Yeon; JunSeok Choe; Olga Gileva; Kevin Insik Hahn; Woon Gu Kang; Go Woon Kim; Kim, H.J.; Yena Kim; Yeongduk Kim; Eun Kyung Lee; Moo Hyun Lee; Douglas S. Leonard; Milyutin, V.; Park, H.; Su-Yeon Park; KeonAh Shin
Publication Date
2023-03
Journal
Frontiers in Physics, v.11
Publisher
Frontiers Media S.A.
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 100Mo isotope using over 100 kg of 100Mo embedded in 200 kg of ultra-pure Li2100MoO4 bolometric crystals. Efficient purification technology was developed and adapted to purify 100MoO3 powder with a 5 kg per month production capacity. Based on the ICP-MS analysis of purified powder, the 232Th and 238U 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 232Th and 238U decay chains, reporting upper limits of <27 μBq/kg for 228Ac and <16 μBq/kg for 228Th. The 226Ra activity was acceptable at 110 ± 30 μBq/kg. In the last 3 years, 100 kg of pure 100MoO3 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. Copyright © 2023 Yeon, Choe, Gileva, Hahn, Kang, Kim, Kim, Kim, Kim, Lee, Lee, Leonard, Milyutin, Park, Park and Shin.
URI
https://pr.ibs.re.kr/handle/8788114/14252
DOI
10.3389/fphy.2023.1142136
ISSN
2296-424X
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
Center for Exotic Nuclear Studies(희귀 핵 연구단) > 1. Journal Papers (저널논문)
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