TITLE

Behavior of the 222Rn daughters on copper surfaces during cleaning

AUTHOR(S)
Wójcik, Marcin; Zuzel, Grzegorz
PUB. DATE
March 2007
SOURCE
AIP Conference Proceedings;2007, Vol. 897 Issue 1, p53
SOURCE TYPE
Conference Proceeding
DOC. TYPE
Article
ABSTRACT
Removal of the long-living 222Rn daughters (210Pb, 210Bi and 210Po) from the copper surface has been investigated. Different methods, like chemical etching and electropolishing, were applied to discs exposed earlier to a strong radon source. A long exposure assured effective accumulation of the 222Rn progenies on the copper surface. Cleaning efficiency for 210Pb was tested using a HPGe spectrometer, for 210Bi a beta spectrometer and for 210Po an alpha spectrometer were used. According to the conducted measurements electropolishing removes very effectively all the isotopes, while etching works only for lead and bismuth, for polonium the cleaning effect is practically negligible. Most probable 210Po is re-deposited on the treated surface. © 2007 American Institute of Physics
ACCESSION #
24660288

 

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