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Neutron background in large-scale xenon detectors for dark matter searches |
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| Authors: | M J Carson J C Davies E Daw R J Hollingworth V A Kudryavtsev T B Lawson P K Lightfoot J E McMillan B Morgan S M Paling M Robinson N J C Spooner D R Tovey |
| Institution: | Department of Physics and Astronomy, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, UK |
| Abstract: | Simulations of the neutron background for future large-scale particle dark matter detectors are presented. Neutrons were generated in rock and detector elements via spontaneous fission and (α,n) reactions, and by cosmic-ray muons. The simulation techniques and results are discussed in the context of the expected sensitivity of a generic liquid xenon dark matter detector. Methods of neutron background suppression are investigated. A sensitivity of 10−9–10−10 pb to WIMP-nucleon interactions can be achieved by a tonne-scale detector. |
| Keywords: | Dark matter WIMPs Neutron background Neutron flux Spontaneous fission (α n) reactions Radioactivity Cosmic-ray muons underground Photomultipliers |
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