Measurements of the ion fraction and mobility of α- And β -decay products in liquid xenon using the EXO-200 detector

Journal Article (Journal Article)

Alpha decays in the EXO-200 detector are used to measure the fraction of charged Po218 and Bi214 daughters created from α and β decays, respectively. Rn222 α decays in liquid xenon (LXe) are found to produce Po+218 ions 50.3±3.0% of the time, while the remainder of the Po218 atoms are neutral. The fraction of Bi+214 from Pb214 β decays in LXe is found to be 76.4±5.7%, inferred from the relative rates of Po218 and Po214 α decays in the LXe. The average velocity of Po218 ions is observed to decrease for longer drift times. Initially the ions have a mobility of 0.390±0.006cm2/(kVs), and at long drift times the mobility is 0.219±0.004cm2/(kVs). Time constants associated with the change in mobility during drift of the Po+218 ions are found to be proportional to the electron lifetime in the LXe.

Full Text

Duke Authors

Cited Authors

  • Albert, JB; Auty, DJ; Barbeau, PS; Beck, D; Belov, V; Breidenbach, M; Brunner, T; Burenkov, A; Cao, GF; Chambers, C; Cleveland, B; Coon, M; Craycraft, A; Daniels, T; Danilov, M; Daugherty, SJ; Davis, CG; Davis, J; Delaquis, S; Der Mesrobian-Kabakian, A; Devoe, R; Didberidze, T; Dolgolenko, A; Dolinski, MJ; Dunford, M; Fairbank, W; Farine, J; Feldmeier, W; Fierlinger, P; Fudenberg, D; Gornea, R; Graham, K; Gratta, G; Hall, C; Hughes, M; Jewell, MJ; Jiang, XS; Johnson, A; Johnson, TN; Johnston, S; Karelin, A; Kaufman, LJ; Killick, R; Koffas, T; Kravitz, S; Kuchenkov, A; Kumar, KS; Leonard, DS; Licciardi, C; Lin, YH; Ling, J; Maclellan, R; Marino, MG; Mong, B; Moore, D; Nelson, R; O'Sullivan, K; Odian, A; Ostrovskiy, I; Piepke, A; Pocar, A; Prescott, CY; Robinson, A; Rowson, PC; Russell, JJ; Schubert, A; Sinclair, D; Smith, E; Stekhanov, V; Tarka, M; Tolba, T; Tsang, R; Twelker, K; Vuilleumier, JL; Waite, A; Walton, J; Walton, T; Weber, M; Wen, LJ; Wichoski, U; Wright, JD; Wood, J; Yang, L; Yen, YR; Zeldovich, OY

Published Date

  • October 28, 2015

Published In

Volume / Issue

  • 92 / 4

Electronic International Standard Serial Number (EISSN)

  • 1089-490X

International Standard Serial Number (ISSN)

  • 0556-2813

Digital Object Identifier (DOI)

  • 10.1103/PhysRevC.92.045504

Citation Source

  • Scopus