We report measurements of the charged daughter fraction of Po-218 as a result of the Rn-222 alpha decay, and the mobility of Po-218(+) ions, using radon-polonium coincidences from the U-238 chain identified in 532 live-days of DarkSide-50 WIMP-search data. The fraction of Po-218 that is charged is found to be 0.37 +/- 0.03 and the mobility of Po-218(+) is (8.6 +/- 0.1) x 10(-4) cm(2)/vs.
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, 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. Cicalò, A.G. Cocco, G. Covone, D. D'Angelo, S. Davini, A.D. Candia, S.D. Cecco, M.D. Deo, G.D. Filippis, G.D. Rosa, A.V. Derbin, A. Devoto, F.D. Eusanio, M. D'Incecco, G.D. 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, A. Ianni, A. Ianni, V. Ippolito, T.N. Johnson, K. Keeter, C.L. Kendziora, I. Kochanek, G. Koh, D. Korablev, G. Korga, A. Kubankin, M. Kuss, M.L. 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.N. 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. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 14:11(2019 Nov 14), pp. P11018.1-P11018.18. [10.1088/1748-0221/14/11/P11018]
Measurement of the ion fraction and mobility of 218Po produced in 222Rn decays in liquid argon
D. D'Angelo;F. Ragusa;
2019
Abstract
We report measurements of the charged daughter fraction of Po-218 as a result of the Rn-222 alpha decay, and the mobility of Po-218(+) ions, using radon-polonium coincidences from the U-238 chain identified in 532 live-days of DarkSide-50 WIMP-search data. The fraction of Po-218 that is charged is found to be 0.37 +/- 0.03 and the mobility of Po-218(+) is (8.6 +/- 0.1) x 10(-4) cm(2)/vs.
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