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Ferella, F.; Nisi, S.; Balata, M.; Grabmayr, P.; Laubenstein, M.; Schwingenheuer, B.; Schönert, S.
Applied radiation and isotopes, 10/2023, Volume: 200Journal Article
LEGEND-200 (Large Enriched Germanium Experiment for Neutrinoless ββ Decay) is a physics experiment at the Gran Sasso National Laboratories (LNGS) in Italy searching for neutrinoless double beta (0υββ) decay of 76Ge using enriched high purity germanium (HPGe) detectors with a total mass of about 200 kg. During the production of germanium crystals, especially during the crystal cutting, a fraction of the enriched germanium remains as metal residues. To reuse these residual materials again for crystal growing, they must be efficiently purified. A special plant was built to purify and convert Ge metal to GeO2. Quadrupole ICP-MS (Q-ICP-MS) and High Resolution ICP-MS (HR-ICP-MS) were used to characterize the starting materials, reaction and final products. The results of the analyses are presented here. •ICP-MS analysis of germanium samples.•Purification of germanium crystals.•Use of high resolution ICP-MS.•Online check of purification system.
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