Lowering the low-energy threshold of xenon detectors

P. Sorensen, J. Angle, E. Aprile, F. Arneodo, L. Baudis, A. Bernstein, A. Bolozdynya, L. C.C. Coelho, C. E. Dahl, L. DeViveiros, A. D. Ferella, L. M.P. Fernandes, S. Fiorucci, R. J. Gaitskell, K. L. Giboni, R. Gomez, R. Hasty, L. Kastens, J. Kwong, J. A.M. LopesN. Madden, A. Manalaysay, A. Manzur, D. N. McKinsey, M. E. Monzani, K. Ni, U. Oberlack, J. Orboeck, G. Plante, R. Santorelli, J. M.F. Dos Santos, S. Schulte, P. Shagin, T. Shutt, C. Winant, M. Yamashita

Research output: Contribution to journalConference articlepeer-review


We show that the energy threshold for nuclear recoils in the XENON10 dark matter search data can be lowered to ∼ 1 keV, by using only the ionization signal. In other words, we make no requirement that a valid event contain a primary scintillation signal. We therefore relinquish incident particle type discrimination, which is based on the ratio of ionization to scintillation in liquid xenon. This method compromises the detector's ability to precisely determine the z coordinate of a particle interaction. However, we show for the first time that it is possible to discriminate bulk events from surface events based solely on the ionization signal.

Original languageEnglish (US)
JournalProceedings of Science
StatePublished - 2010
Event8th International Workshop on Identification of Dark Matter, IDM 2010 - Montpellier, France
Duration: Jul 26 2010Jul 30 2010

ASJC Scopus subject areas

  • General


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