Table 2.
Physical Properties of Some Common SPECT Radiometalsa
| isotope | half-life/h | source | production reaction | decay mode (% branching ratio) | Eγ/keV | abundance, Iγ/% | relevant oxidation states | common coordination numbers |
|---|---|---|---|---|---|---|---|---|
| 67Ga | 78.2 | cyclotron | natZn(p,x)67Ga | ε (100) | 91.265(5) | 3.11(4) | 3+ | 4, 5, 6 |
| 68Zn(p,2n)67Ga | 93.310(5) | 38.81(3) | ||||||
| 184.576(10) | 21.410(10) | |||||||
| 208.950(10) | 2.460(10) | |||||||
| 300.217(10) | 16.64(12) | |||||||
| 393.527(10) | 4.56(24) | |||||||
| 99mTc | 6.0 | generator | 99Mo/99mTc | β−(0.0037) | 140.511(1) | 89.06 | 1− to 7+ | 4, 5, 6 |
| IT (99.9963) | ||||||||
| 111In | 67.3 | cyclotron | 111Cd(p,n)111In | ε (100) | 171.28(3) | 90.7(9) | 3+ | 5, 6, 7, 8 |
| 245.35(4) | 94.1(10) |
a
Unless otherwise stated, standard deviations are given in parentheses (IT = isomeric transition; ε = electron capture).208