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    Agnes, P.; Albuquerque, I. F. M.; Alexander, T.; Alton, A. K.; Ave, M.; Back, H. O.; Batignani, G.; Bussino, S.; Cadoni, M.; Calaprice, F.; Caminata, A.; Caravati, M.; Cariello, M.; Carlini, M.; Carpinelli, M.; Catalanotti, S.; Cataudella, V.; Cavalcante, P.; Cavuoti, S.; Chepurnov, A.; Cicalò, C.; Cocco, A. G.; Covone, G.; D’Angelo, D.; Davini, S.; De Cecco, S.; De Filippis, G.; De Rosa, G.; Derbin, A. V.; Dionisi, C.; Downing, M.; D’Urso, D.; Fiorillo, G.; Franco, D.; Gabriele, F.; Ghiano, C.; Giganti, C.; Gorchakov, O.; Grobov, A.; Gromov, M.; Guardincerri, Y.; Hackett, B. R.; Hosseini, B.; Hubaut, F.; Ippolito, V.; Keeter, K.; Kendziora, C. L.; Korga, G.; Kubankin, A.; Kuss, M.; La Commara, M.; Li, X.; Lissia, M.; Longo, G.; Machulin, I. N.; Mari, S. M.; Maricic, J.; Martoff, C. J.; Messina, A.; Meyers, P. D.; Milincic, R.; Morrocchi, M.; Mougeot, X.; Musico, P.; Nozdrina, A. O.; Oleinik, A.; Ortica, F.; Pagani, L.; Pallavicini, M.; Pandola, L.; Pelczar, K.; Pelliccia, N.; Pocar, A.; Pordes, S.; Poudel, S. S.; Pralavorio, P.; Razeti, M.; Razeto, A.; Renshaw, A. L.; Rescigno, M.; Romani, A.; Sablone, D.; Samoylov, O.; Savarese, C.; Schlitzer, B.; Semenov, D. A.; Smirnov, O.; Sotnikov, A.; Suvorov, Y.; Tartaglia, R.; Testera, G.; Tonazzo, A.; Unzhakov, E. V.; Vishneva, A.; Wada, M.; Wang, H.; Wang, Y.; Xiao, X.; Yang, C.; Zuzel, G.

    Physical review. D, 10/2021, Letnik: 104, Številka: 8
    Journal Article

    DarkSide-50 has demonstrated the high potential of dual-phase liquid argon time projection chambers in exploring interactions of WIMPs in the GeV/c2 mass range. The technique, based on the detection of the ionization signal amplified via electroluminescence in the gas phase, allows us to explore recoil energies down to the sub-keV range. We report here on the DarkSide-50 measurement of the ionization yield of electronic recoils down to ~ 180 eVer, exploiting 37Ar and 39Ar decays, and extrapolated to a few ionization electrons with the Thomas-Imel box model. Moreover, we present a model-dependent determination of the ionization response to nuclear recoils down to ~ 500 eVnr, the lowest ever achieved in liquid argon, using in situ neutron calibration sources and external datasets from neutron beam experiments.