$^{76}$Ge Detectors of LEGEND experiment: Production, Characterization, Performance

Le résumé fourni par la source

The LEGEND Collaboration advances an experimental program to search for the neutrinoless double-beta decay of $^{76}$Ge. LEGEND-200, the first stage of this program, recently completed its commissioning process at LNGS in Italy. About 140~kg of $^{76}$Ge-enriched high-purity germanium detectors immersed in liquid argon are now continuously taking low background data. The LEGEND experiment integrates the advanced technology of the germanium detectors used in the GERDA and MAJORANA experiments. They are well suited for $\gamma$-rays measurements at the MeV energy scale, yielding high detection efficiency. The crystal growing procedure results in naturally low internal radioactivity and is a well-established technology. A precise understanding of the behavior of the germanium detectors is fundamental to determine their optimal operational parameters and it necessitates extensive detector characterization. This contribution will present the latest state-of-the-art approach to the production chain, the characterization measurements, and the performance of germanium detectors installed in LEGEND-200 so far.

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