| Material | Isotope | T½ | Absolute decay rate (Bk) | Decay mode | Particle energy (keV) | Particle emission intensity (%) |
| UO2(NO3)2・6H2O | 238U | 4.468(5) × 109 y | 4.3(3) × 106 | α | 4198 | 77.5(5) |
|
|
|
|
|
| 4151 | 22.3(5) |
|
|
|
|
|
| 4038 | 0.13(3) |
|
| 235U | 7.04(1) × 108 y | 69.9(2) × 103 | α | 4397.8 | 57.19(20) |
|
|
|
|
|
| 4366.1 | 18.30(13) |
|
|
|
|
|
| 4214.7 | 5.95(12) |
|
|
|
|
|
| 4596.4 | 4.74(6) |
|
|
|
|
|
| 4556.0 | 3.79(6) |
|
|
|
|
|
| 4322 | 3.33(6) |
|
|
|
|
|
| 4414.9 | 3.01(16) |
|
|
|
|
|
| 4502.4 | 1.28(5) |
|
| 234U | 2.455(6)・105 y | 522(2) × 03 | α | 4774.6 | 71.37(2) |
|
|
|
|
|
| 4722.4 | 28.42(2) |
|
|
|
|
|
| 4603.5 | 0.210(2) |
|
| 228Th | 1.9126(9) y | 1.70(8) × 103 | α | 5423.24(22) | 74.0(6) |
|
|
|
|
|
| 5340.35(22) | 26.0(8) |
| KBr | 40K | 1.407(7) × 109 y | 5.7(2) × 103 | β− | 1311.09 | 89.25(17) |
|
|
| 11.90(11) × 109 y |
| EC | 1504.9 | 10.55(11) |