Hydrogen reduction of enriched germanium dioxide and zone-refining for the LEGEND experiment
Hydrogen reduction of enriched germanium dioxide and zone-refining for the LEGEND experiment
复制标题
LEGEND 实验中富集二氧化锗的氢还原和区域精炼
DOI:
10.1088/1748-0221/15/12/p12010
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发表时间:
2020
影响因子:
1.3
通讯作者:
Sumathi, R.R.
中科院分区:
文献类型:
--
作者:
Gradwohl, K.-P.;Moras, O.;Janicskó-Csáthy, J.;Schönert, S.;Sumathi, R.R.
The LEGEND experiment, now under construction, will operate a large array of germanium detectors for the search of neutrinoless double-beta decay of 76 Ge. In this paper we report on the process development for the hydrogen reduction of germanium dioxide enriched in 76 Ge as part of the effort to manufacture detectors for the LEGEND experiment. The process was optimized via a kinetic un-reacted shrinking model and tested with a batch of natural GeO 2. We completed the reduction of a batch of 23 kg isotopically enriched germanium with an average yield of 99.85%. Subsequently, the germanium was purified to intrinsic purity by zone-refining and an overall germanium yield of 99.05% was achieved. Using an intermediate underground storage, an average cosmogenic exposure of 156 h was accumulated. Special care was taken to avoid and recycle losses during the process.
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