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

Journal Article · Thu Nov 14 00:00:00 EST 2019 · Journal of Instrumentation

DOI:https://doi.org/10.1088/1748-0221/14/11/P11018· OSTI ID:1558441

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

Here, 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$$^{-4}$$$$\frac{\text{cm}^2}{\text{Vs}}$$.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: DARKSIDE Collaboration
• Grant/Contract Number: AC02-07CH11359; FG02-91ER40671
• OSTI ID: 1558441
• Alternate ID(s): OSTI ID: 1773038; OSTI ID: 22891438
• Report Number(s): FERMILAB-PUB--19-435-AE-ND-PPD-SCD; arXiv:1907.09332; oai:inspirehep.net:1744857
• Journal Information: Journal of Instrumentation, Journal Name: Journal of Instrumentation Journal Issue: 11 Vol. 14; ISSN 1748-0221
• Publisher: Institute of Physics (IOP)
• Country of Publication: United States
• Language: English

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