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Title: Liquid xenon purification, de-radonation (and de-kryptonation)

Liquid xenon detectors are at the forefront of rare event physics, including searches for neutrino-less double beta decay and WIMP dark matter. The xenon for these experiments needs to be purified from chemical impurities such as electronegative atoms and molecules, which absorb ionization electrons, and VUV (178 nm) scintillation light-absorbing chemical species. In addition, superb purification from radioactive impurities is required. Particularly challenging are radioactive noble isotopes ({sup 85}Kr,{sup 39,42}Ar,{sup 220,222}Rn). Radon is a particularly universal problem, due to the extended decay sequence of its daughters and its ubiquitous presence in detector materials. Purification and de-radonation of liquid xenon are addressed with particular focus on the experience gained with the EXO-200 neutrino-less double beta decay detector.
Authors:
 [1] ;  [2]
  1. Amherst Center for Fundamental Interactions and Physics Department, University of Massachusetts, Amherst, Massachusetts 01003 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22488706
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1672; Journal Issue: 1; Conference: LRT 2015: 5. international workshop in low radioactivity techniques, Seattle, WA (United States), 18-20 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ARGON 39; ARGON 42; ATOMS; DOUBLE BETA DECAY; ELECTRONS; FAR ULTRAVIOLET RADIATION; GAIN; IMPURITIES; KRYPTON 85; LIQUID SCINTILLATION DETECTORS; MOLECULES; NEUTRINOS; NONLUMINOUS MATTER; PURIFICATION; RADON; RADON 220; RADON 222; SCINTILLATIONS; VISIBLE RADIATION; XENON