Measurements of the ion fraction and mobility of α− and β -decay products in liquid xenon using the EXO-200 detector
Year: 2015
Type: article
Abstract: Alpha decays in the EXO-200 detector are used to measure the fraction of charged $^{218}\text{Po}$ and $^{214}\text{Bi}$ daughters created from $\ensuremath{\alpha}$ and $\ensuremath{\beta}$ decays, respectively. $^{222}\text{Rn} \ensuremath{\alpha}$ decays in liquid xenon (LXe) are found to produce $^{218}\text{Po}^{+}$ ions $50.3\ifmmode\pm\else\textpm\fi{}3.0%$ of the time, while the remainder of the $^{218}\text{Po}$ atoms are neutral. The fraction of $^{214}\text{Bi}^{+}$ from $^{214}\text{Pb} \ensuremath{\beta}$ decays in LXe is found to be $76.4\ifmmode\pm\else\textpm\fi{}5.7%$, inferred from the relative rates of $^{218}\text{Po}$ and $^{214}\text{Po} \ensuremath{\alpha}$ decays in the LXe. The average velocity of $^{218}\text{Po}$ ions is observed to decrease for longer drift times. Initially the ions have a mobility of $0.390\ifmmode\pm\else\textpm\fi{}0.006\phantom{\rule{4pt}{0ex}}{\text{cm}}^{2}/(\text{kV}\text{s})$, and at long drift times the mobility is $0.219\ifmmode\pm\else\textpm\fi{}0.004\phantom{\rule{4pt}{0ex}}{\text{cm}}^{2}/(\text{kV}\text{s})$. Time constants associated with the change in mobility during drift of the $^{218}\text{Po}^{+}$ ions are found to be proportional to the electron lifetime in the LXe.
Source: Physical Review C
Authors: J. B. Albert, D. J. Auty, P. S. Barbeau, D. Beck, V. Belov, M. Breidenbach, T. Brunner, A. Burenkov, G. F. Cao, C. Chambers, B. Cleveland, M. Coon, A. Craycraft, T. Daniels, M. Danilov, S. J. Daugherty, C. G. Davis, J. Davis, S. Delaquis, A. Der Mesrobian-Kabakian, R. DeVoe, T. Didberidze, A. Dolgolenko, M. J. Dolinski, M. Dunford, W. Fairbank, J. Farine, W. Feldmeier, P. Fierlinger, D. Fudenberg, R. Gornea, K. Graham, G. Gratta, C. Hall, M. Hughes, M. J. Jewell, X. S. Jiang, A. Johnson, T. N. Johnson, S. Johnston, A. Karelin, L. J. Kaufman, R. Killick, T. Koffas, S. Kravitz, A. Kuchenkov, K. S. Kumar, D. S. Leonard, C. Licciardi, Y. H. Lin, J. Ling, R. MacLellan, M. G. Marino, B. Mong, D. Moore, R. Nelson, K. O'Sullivan, A. Odian, I. Ostrovskiy, A. Piepke, A. Pocar, C. Y. Prescott, A. Robinson, P. C. Rowson, J. J. Russell, A. Schubert, D. Sinclair, E. Smith, V. Stekhanov, M. Tarka, T. Tolba, R. Tsang, K. Twelker, J.-L. Vuilleumier, A. Waite, J. Walton, T. Walton, M. Weber, L. J. Wen, U. Wichoski, J. D. Wright, J. Wood, L. Yang, Y.-R. Yen, O. Ya. Zeldovich
Institutions: Indiana University Bloomington, Indiana University, University of Alabama, Duke University, Triangle Universities Nuclear Laboratory, University of Illinois Urbana-Champaign, Institute for Theoretical and Experimental Physics, SLAC National Accelerator Laboratory, Stanford University, Institute of High Energy Physics, Colorado State University, Laurentian University, University of Maryland, College Park, University of Bern, Drexel University, Carleton University, Excellence Cluster Universe, Technical University of Munich, University of Massachusetts Amherst, Stony Brook University, Institute for Basic Science, University of South Dakota, TRIUMF
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, National Energy Research Scientific Computing Center, Deutsche Forschungsgemeinschaft, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Russian Foundation for Basic Research, Chinese Academy of Sciences, Office of Science, Natural Sciences and Engineering Research Council of Canada, Institute of High Energy Physics
Awards: G42916606, G449121620
OpenAlex ID: W605245482