Zuzel Grzegorz , Wójcik Marcin , Majorovits B., Lampert M. O., Wendling P.
editor:
Orrell John L.
book title:
Low Radioactivity Techniques 2015 (LRT 2015) : proceedings of the 5th International Workshop in Low Radioactivity Techniques : 18-20 March 2015, Seattle, WA, USA
Removal of the long-lived ^{222}Rn daughters (^{210} Pb, ^{210}Bi and ^{210}Po) from copper, stainless steel and germanium surfaces was investigated. As cleaning techniques etching and electro-polishing was applied to samples in a form of discs exposed earlier to a strong radon source. Reduction of the ^{210} Pb activity was tested using a HPGe spectrometer, for ^{210}Bi a beta spectrometer and for ^{210}Po an alpha spectrometer was used. According to the conducted measurements electro-polishing was always more efficient compared to etching and in case of copper the activity reduction factors for ^{210} Pb, ^{210}Bi and ^{210}Po were between 200 and 400. Etching does not remove ^{210}Po from copper but works very efficiently from germanium. Results obtained for ^{210} Pb and ^{210}Bi for etched stainless steel were worse but still slightly better than those achieved for copper.
keywords in English:
Copper, elemental semiconductors, etching, germanium, lead
number of pulisher's sheets:
0,3
conference:
5th International Workshop in Low Radioactivity Techniques (LRT 2015); 2015-03-18; 2015-03-20; Seattle; Stany Zjednoczone Ameryki; indeksowana w Web of Science; ; ;
affiliation:
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego