Radon induced surface contaminations in low background experiments
- INFN - Laboratori Nazionali del Gran Sasso, I-67010 Assergi (AQ) (Italy)
In neutrinoless double-beta decay and dark matter searches, one of the main issues is to increase the experimental sensitivity through careful material selection and production, minimizing the background contributions. In order to achieve the required, extremely low, counting rates, very stringent requirements must be fulfilled in terms of bulk material radiopurity. As the experimental sensitivity increases, the bulk impurities in the detector components decrease, and surface contaminations start to play an increasingly significant role In fully active detectors, like cryogenic particle detectors, surface contaminations are a critical issue (as shown by the CUORICINO experiment). {sup 222}Rn is by far the most intense source of airborne radioactivity, and if a radio-pure material is exposed to environment where the Radon concentration is not minimized, {sup 210}Pb and {sup 210}Po contaminations can occur. The mechanisms and the dynamics of Radon-induced surface contaminations are reviewed, and specific solutions to prevent and to reject the induced background are presented.
- OSTI ID:
- 22218204
- Journal Information:
- AIP Conference Proceedings, Vol. 1549, Issue 1; Conference: LRT 2013: 4. international workshop on low radioactivity techniques, Assergi (Italy), 10-12 Apr 2013; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CONCENTRATION RATIO
COUNTING RATES
CRYOGENICS
DOUBLE BETA DECAY
IMPURITIES
LEAD 210
MULTIPARTICLE SPECTROMETERS
NONLUMINOUS MATTER
PARTICLE IDENTIFICATION
POLONIUM 210
RADIATION DETECTORS
RADIOACTIVITY
RADON 222
SENSITIVITY
SURFACE CONTAMINATION