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| sample (source) | analysis | U conc. (ppb) |
Th conc. (ppb) |
K conc. (ppm) |
comments | |
| by | method | |||||
| Al + 4% Si | F | GES | < 0.3(a) | < 1.2(b) | < 0.8 | 137Cs < 0.15 kru; 60Co < 0.15 kru |
| Altuglas | F | GES | < 0.6(a) | < 2.3(b) | < 2.7 | 137Cs < 0.3 kru; 60Co < 0.4 kru |
| Brass (screws) | F | GES | < 0.3(a) | < 1.2(b) | < 1.6 | 137Cs < 0.15 kru; 60Co < 0.3 kru |
| Capacitors (epoxy) | F | GES | < 1.4(a) | < 5(b) | < 5.5 | 137Cs < 1.5 kru; 60Co < 3 kru |
| CsI (Na) | F | GES | < 3(a) | < 6(b) | < 11 | 137Cs 370 kru; 60Co < 0.7 kru |
| Cu (OFHC) | F | GES | < 0.4(a) | < 1.4(b) | < 1.6 | 137Cs < 0.3 kru; 60Co < 0.3 kru |
| Delrin | F | GES | < 0.03(a) | < 0.23(b) | < 0.2 | 137Cs 0.09kru; 60Co 0.06kru |
| Epoxy | F | GES | < 1.4(a) | < 9(b) | < 22 | 137Cs < 1.5 kru; 60Co < 3 kru |
| Fe | F | GES | < 0.4(a) | < 1.2(b) | < 2.2 | 137Cs < 0.3 kru; 60Co < 3 kru |
| NaI(Tl) | F | GES | 27(a) | 23(b) | 1100 | 137Cs 4 kru; 60Co 9kru |
| NE110 (plastic scintillator) | F | GES | 2.7(a) | < 5(b) | < 5.5 | 137Cs < 0.6 kru; 60Co < 0.6 kru |
| Ni | F | GES | < 3(a) | < 12(b) | < 22 | 137Cs < 3 kru; 60Co < 6 kru |
| Nylon | F | GES | < 0.7(a) | < 2.3(b) | < 3 | 137Cs < 0.5 kru; 60Co < 0.3 kru |
| Pb | F | GES | < 0.3(a) | < 1.2(b) | < 1.1 | 137Cs < 0.15 kru; 60Co < 0.15 kru |
| PTFE (Teflon) | F | GES | < 0.7(a) | < 2.3(b) | < 2.2 | 137Cs < 0.3 kru; 60Co < 0.4 kru |
| Resistors | F | GES | 68(a) | 230(b) | 430 | 137Cs 5 kru; 60Co < 1.5 kru |
| Sapphire | F | GES | < 3(a) | < 9(b) | < 11 | 137Cs < 1.5 kru; 60Co < 2 kru |
| Si (monocrystalline) | F | GES | < 1.4(a) | < 4(b) | < 5.5 | 137Cs < 0.7 kru; 60Co < 1.2 kru |
| Stainless steel | F | GES | < 0.3(a) | < 1.2(b) | < 1.6 | 137Cs < 0.3 kru; 60Co 2.9kru |
| Ti (screws) | F | GES | < 0.6(a) | < 5(b) | < 2.2 | 137Cs < 3 kru; 60Co < 4 kru |
| Analysts: | Analysis methods: |
| F: Fréjus collaboration | GES: Gamma Emission Spectroscopy |
Notes:
| (a): | from 214Bi g count, U chain assumed in equilibrium. |
| (b): | from 208Tl g count, Th chain assumed in equilibrium. |
Other remarks:
