Materials | Activity concentration | References | ||
226Ra | 232Th | 40K | ||
Titanium enamel frits | 1.05 - 1018.57 | 1.05 - 1164.09 | 942.29 - 16,679.19 | [22] |
Painting oxides | 2.35 - 72.96 | 1.76 - 12.88 | 2.26 - 200 | [23] |
Paits | 10.5 - 43.0 | 0.5 - 0.5 | 0.5 - 7.7 | [24] |
Polishing | 0.60 - 13.61 | 0.78 - 18.43 | 2.47 - 342.59 | Present work |