| Aktiva substanser | Betyg | Bibliogr. | Expandera | |
|---|---|---|---|---|
| 1 | Ruteniumradioisotoper | 100 | + | |
| 2 | Koboltradioisotoper | 17 | + | |
| 3 | Strontiumradioisotoper | 13 | + | |
| 4 | Cesiumradioisotoper | 10 | + | |
| 5 | Kalciumradioisotoper | 8 | + | |
| 6 | Iridiumradioisotoper | 7 | + | |
| 7 | Kopparradioisotoper | 7 | + | |
| 8 | Kolradioisotoper | 4 | + |