skip to main content

Title: A radon progeny deposition model

The next generation low-background detectors operating underground aim for unprecedented low levels of radioactive backgrounds. Although the radioactive decays of airborne radon (particularly {sup 222}Rn) 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 {sup 210}Pb 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.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2]
  1. Los Alamos National Laboratory
  2. MIT
Publication Date:
OSTI Identifier:
1042977
Report Number(s):
LA-UR-10-07980; LA-UR-10-7980
TRN: US1202974
DOE Contract Number:
AC52-06NA25396
Resource Type:
Journal Article
Research Org:
Los Alamos National Laboratory (LANL)
Sponsoring Org:
DOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AIR; BACKGROUND RADIATION; CLEAN ROOMS; DEPOSITION; HALF-LIFE; PROGENY; RADIATION DETECTORS; RADON; SIMULATION; SURFACE CONTAMINATION; SURFACES