Observation and applications of single-electron charge signals in the XENON100 experiment

  title={Observation and applications of single-electron charge signals in the XENON100 experiment},
  author={Elena Aprile and Matteo Alfonsi and Katsushi Arisaka and Francesco Arneodo and Cristina Balan and L. Baudis and Boris Bauermeister and Annika Behrens and Paolo Beltrame and Karen Bokeloh and A. M. Brown and Ethan Brown and S. Bruenner and Gianmarco Bruno and Ranny Budnik and Jo{\~a}o M. R. Cardoso and W.-T. Chen and B. Choi and Auke-Pieter Colijn and H. A. Contreras and J. P. Cussonneau and M. P. Decowski and Ehud Duchovni and S Fattori and Alfredo D. Ferella and Walter Fulgione and F. Gao and Marco Garbini and Chamkaur Ghag and Karl Ludwig Giboni and L. W. Goetzke and Cyril Grignon and Eilam Gross and Wolfgang Hampel and Ran Itay and Florian Kaether and Gaudenz Kessler and Alexander Kish and J. Lamblin and Hagar Landsman and Rafael F. Lang and M. Le Calloch and Cecilia Levy and K. E. Lim and Q. Lin and Sebastian Lindemann and Manfred Lindner and Jos{\'e} A. M. Lopes and Kevin Lung and Teresa Marrod'an Undagoitia and Fabio Valerio Massoli and A. J. Melgarejo Fernandez and Yue Meng and Marcello Messina and Andrea Molinario and Junji Naganoma and Kaixiang Ni and Uwe G. Oberlack and S. E. A. Orrigo and Emilija Pantic and Rino Persiani and Francesco Piastra and Guillaume Plante and Nadav Priel and Alfio Rizzo and S. S. E. Rosendahl and J. M. F. Santos and Gabriella Sartorelli and Jochen Schreiner and Marc Schumann and Luca Scotto Lavina and Marco Selvi and Peter Shagin and Hardy Simgen and Artin Teymourian and Dominique Thers and Ofer Vitells and H. G. Wang and M. Weber and Christian Weinheimer},
  journal={Journal of Physics G},
The XENON100 dark matter experiment uses liquid xenon in a time projection chamber (TPC) to measure xenon nuclear recoils resulting from the scattering of dark matter weakly interacting massive particles (WIMPs). In this paper, we report the observation of single-electron charge signals which are not related to WIMP interactions. These signals, which show the excellent sensitivity of the detector to small charge signals, are explained as being due to the photoionization of impurities in the… 

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