| Radionuclides | Energies (keV) |
| Cobalt-57 | 122 |
| Cerium-139 | 165.864 |
| Pewter-113 | 391.69 |
| Cesium-137 | 661.66 |
| Yttrium-88 | 898.042 |
| Cobalt-60 | 1173.237 |
| Cobalt-60 | 1332.501 |
| Yttrium-88 | 1836.063 |