| Matrix | Density (g/cm3) | Totalactives (Bq) | Source distr. |
| Water | 1.0 | ~10E3 | uniform |
| Concrete | 1.9 | ~10E3 | near uniform |
| Carbon | 1.0 | ~10E7 | near uniform |
| Plastic | 1.1 | ~10E5 | near uniform |
| Resin | 0.9 | ~10E5 | near uniform |
| Concrete | 1.8 - 2.1 | ~10E5 | near uniform |
| Aluminium plate | 0.4 - 0.9 | ~10E2 | non uniform |
| Iron plate | 0.7 - 0.9 | ~10E5 | non uniform |
| Iron tube | 0.5 - 0.9 | ~10E5 | non uniform |