Enriched high purity germanium detectors for the LEGEND-200 experiment: 
purification and characterization by quadrupole and high resolution inductively 
coupled plasma mass spectrometry (ICP-MS)

Ferella, F.; Nisi, S.; Balata, M.; Grabmayr, P.; Laubenstein, M.; Schwingenheuer, B.; Schoenert, S.

doi:10.1016/j.apradiso.2023.110904

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Enriched high purity germanium detectors for the LEGEND-200 experiment: purification and characterization by quadrupole and high resolution inductively coupled plasma mass spectrometry (ICP-MS)

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Schwingenheuer, B.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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https://www.sciencedirect.com/science/article/abs/pii/S0969804323002579?via%3Dihub
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Citation

Ferella, F., Nisi, S., Balata, M., Grabmayr, P., Laubenstein, M., Schwingenheuer, B., et al. (2023). Enriched high purity germanium detectors for the LEGEND-200 experiment: purification and characterization by quadrupole and high resolution inductively coupled plasma mass spectrometry (ICP-MS). Applied Radiation and Isotopes, 200: 110904. doi:10.1016/j.apradiso.2023.110904.

Cite as: https://hdl.handle.net/21.11116/0000-000D-A0F9-5

Abstract

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.