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arxiv: 1907.09332 · v2 · pith:JMMOIRK4new · submitted 2019-07-22 · 🌌 astro-ph.IM · physics.ins-det

Measurement of the ion fraction and mobility of ²¹⁸Po produced in ²²²Rn decays in liquid argon

P. Agnes , I.F.M. Albuquerque , T. Alexander , A.K. Alton , M. Ave , H.O. Back , G. Batignani , K. Biery
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V. Bocci G. Bonfini W.M. Bonivento B. Bottino S. Bussino M. Cadeddu M. Cadoni F. Calaprice A. Caminata N. Canci A. Candela M. Caravati M. Cariello M. Carlini M. Carpinelli S. Catalanotti V. Cataudella P. Cavalcante S. Cavuoti A. Chepurnov C. Cicalo A.G. Cocco G. Covone D. D'Angelo S. Davini A. De Candia S. De Cecco M. De Deo G. De Filippis G. De Rosa A.V. Derbin A. Devoto F. Di Eusanio M. D'Incecco G. Di Pietro C. Dionisi M. Downing D. D'Urso E. Edkins A. Empl G. Fiorillo K. Fomenko D. Franco F. Gabriele C. Galbiati C. Ghiano S. Giagu C. Giganti G.K. Giovanetti O. Gorchakov A.M. Goretti F. Granato A. Grobov M. Gromov M. Guan Y. Guardincerri M. Gulino B.R. Hackett K. Herner B. Hosseini D. Hughes P. Humble E.V. Hungerford Al. Ianni An. Ianni V. Ippolito T.N. Johnson K. Keeter C.L. Kendziora I. Kochanek G. Koh D. Korablev G. Korga A. Kubankin M. Kuss M. La Commara M. Lai X. Li M. Lissia G. Longo A.A. Machado I.N. Machulin A. Mandarano L. Mapelli S.M. Mari J. Maricic C.J. Martoff A. Messina P.D. Meyers R. Milincic A. Monte M. Morrocchi V.N. Muratova P. Musico A. Navrer Agasson A.O. Nozdrina A. Oleinik M. Orsini F. Ortica L. Pagani M. Pallavicini L. Pandola E. Pantic E. Paoloni K. Pelczar N. Pelliccia E. Picciau A. Pocar S. Pordes S.S. Poudel H. Qian F. Ragusa M. Razeti A. Razeto A.L. Renshaw M. Rescigno Q. Riffard A. Romani B. Rossi N. Rossi D. Sablone O. Samoylov W. Sands S. Sanfilippo C. Savarese B. Schlitzer E. Segreto D.A. Semenov A. Shchagin A. Sheshukov P.N. Singh M.D. Skorokhvatov O. Smirnov A. Sotnikov C. Stanford S. Stracka Y. Suvorov R. Tartaglia G. Testera A. Tonazzo P. Trinchese E.V. Unzhakov M. Verducci A. Vishneva R.B. Vogelaar M. Wada T.J. Waldrop H. Wang Y. Wang A.W. Watson S. Westerdale M.M. Wojcik X. Xiang X. Xiao C. Yang Z. Ye C. Zhu G. Zuzel
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keywords fractionmobilitychargedtextalphaargonchaincoincidences
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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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