Main Physical Properties of 18F, 68Ga, and 64Cu
| Radionuclide | Half-life | Production | Positron-branching | Mean/max β+ energy (MeV) (63) | Positron range in water (mm) (Rrms/Rmax) (63) |
| 18F | 109.8 min | Cyclotron | 96.7% | 0.250/0.64 | 0.2/2.3 |
| 68Ga | 67.6 min | 68Ge/68Ga generator | 89.1% | 0.836/1.9 | 1.2/9.0 |
| 64Cu | 12.7 h | Cyclotron | 17.4% | 0.278/0.58 | 0.2/2.0 |
Rrms/Rmax = root-mean square positron range/maximum extrapolated range.