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  • Measurement of the ion fraction and mobility of \(^{218}\)Po produced in \(^{222}\)Rn decays in liquid argon
    Alexander, T; Ave, M; Back, H O; Batignani, G; Bocci, V; Bonivento, W M; Bussino, S; Cadeddu, M; Calaprice, F; Candela, A; Carlini, M; Carpinelli, M; Catalanotti, S; Cavalcante, P; Cavuoti, S; Chepurnov, A; Cicalo, C; Cocco, A G; Covone, G; D'Angelo, D; De Cecco, S; De Deo, M; De Rosa, G; Derbin, A V; Devoto, A; F Di Eusanio; G Di Pietro; Dionisi, C; Downing, M; D'Urso, D; Edkins, E; Empl, A; Fomenko, K; Franco, D; Gabriele, F; Ghiano, C; Giagu, S; Giganti, C; Giovanetti, G K; Granato, F; Grobov, A; Gromov, M; Guardincerri, Y; Gulino, M; Herner, K; Hosseini, B; Hughes, D; Hungerford, E V; Ippolito, V; Johnson, T N; Kendziora, C L; Kochanek, I; Koh, G; Korablev, D; Korga, G; Kubankin, A; Kuss, M; Lai, M; Lissia, M; Longo, G; Mandarano, A; Mapelli, L; Mari, S M; Messina, A; Meyers, P D; Musico, P; Oleinik, A; Orsini, M; Pagani, L; Pallavicini, M; Pelczar, K; Pelliccia, N; Picciau, E; Poudel, S S; Qian, H; Razeti, M; Renshaw, A L; Rossi, B; Sablone, D; Sands, W; Sanfilippo, S; Schlitzer, B; Sheshukov, A; Skorokhvatov, M D; Stanford, C; Stracka, S; Testera, G; Tonazzo, A; Trinchese, P; Unzhakov, E V; Verducci, M; Vishneva, A; Wada, M; Waldrop, T J; Westerdale, S; Wojcik, M M; Xiang, X; Xiao, X; Yang, C; Zhu, C

    arXiv.org, 10/2019
    Paper, Journal Article

    We report measurements of the charged daughter fraction of \(^{218}\)Po as a result of the \(^{222}\)Rn alpha decay, and the mobility of \(^{218}\)Po\(^+\) ions, using radon-polonium coincidences from the \(^{238}\)U chain identified in 532 live-days of DarkSide-50 WIMP-search data. The fraction of \(^{218}\)Po that is charged is found to be 0.37\(\pm\)0.03 and the mobility of \(^{218}\)Po\(^+\) is (8.6\(\pm\)0.1)\(\times\)10$^{-4}$$\frac{\text{cm}^2}{\text{Vs}}$.

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