Study of the electromagnetic background in the XENON100 experiment

E. Aprile, K. Arisaka, F. Arneodo, A. Askin, L. Baudis, A. Behrens, K. Bokeloh, E. Brown, J. M.R. Cardoso, B. Choi, D. Cline, S. Fattori, A. D. Ferella, K. L. Giboni, A. Kish, C. W. Lam, J. Lamblin, R. F. Lang, K. E. Lim, Q. LinS. Lindemann, M. Lindner, J. A.M. Lopes, K. Lung, T. Marrodán Undagoitia, Y. Mei, A. J. Melgarejo Fernandez, K. Ni, U. Oberlack, S. E.A. Orrigo, E. Pantic, G. Plante, A. C.C. Ribeiro, R. Santorelli, J. M.F. Dos Santos, M. Schumann, P. Shagin, H. Simgen, A. Teymourian, D. Thers, E. Tziaferi, H. Wang, M. Weber, C. Weinheimer

Research output: Contribution to journalArticlepeer-review


The XENON100 experiment, located at the Laboratori Nazionali del Gran Sasso, aims to directly detect dark matter in the form of weakly interacting massive particles via their elastic scattering off xenon nuclei. We present a comprehensive study of the predicted electronic recoil background coming from radioactive decays inside the detector and shield materials and intrinsic radioactivity in the liquid xenon. Based on GEANT4 Monte Carlo simulations using a detailed geometry together with the measured radioactivity of all detector components, we predict an electronic recoil background in the energy region of interest and 30 kg fiducial mass of less than 10-2events•kg -1•day-1•keV-1, consistent with the experiment's design goal. The predicted background spectrum is in very good agreement with the data taken during the commissioning of the detector in Fall 2009.

Original languageEnglish (US)
Article number082001
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number8
StatePublished - Apr 19 2011

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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