Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2010-12-30
AIP Conf. Proc. 1338 (2011) 95-100
Physics
Nuclear Physics
Nuclear Experiment
Proceedings of the Topical Workshop in Low Radioactivity Techniques, (Sudbury, Canada) August 28-29, 2010
Scientific paper
10.1063/1.3579565
The next generation low-background detectors operating underground aim for unprecedented low levels of radioactive backgrounds. Although the radioactive decays of airborne radon (particularly Rn-222) and its subsequent progeny present in an experiment are potential backgrounds, also problematic is the deposition of radon progeny on detector materials. Exposure to radon at any stage of assembly of an experiment can result in surface contamination by progeny supported by the long half life (22 y) of Pb-210 on sensitive locations of a detector. An understanding of the potential surface contamination from deposition will enable requirements of radon-reduced air and clean room environments for the assembly of low background experiments. It is known that there are a number of environmental factors that govern the deposition of progeny onto surfaces. However, existing models have not explored the impact of some environmental factors important for low background experiments. A test stand has been constructed to deposit radon progeny on various surfaces under a controlled environment in order to develop a deposition model. Results from this test stand and the resulting deposition model are presented.
Elliott Steven R.
Guiseppe Vincente E.
Hime Andrew
Rielage Keith
Westerdale Shawn
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