Input interpretation
Th-232 U-238 | half-life
Results
Th-232 | 14 Gyr (gigayears) (-22 to 50 Gyr) U-238 | 4.47 Gyr (gigayears) (4.463 to 4.4745 Gyr)
Units
Relative values
| visual | ratios | | comparisons U-238 | | 0.319 | 1 | 68.1% smaller Th-232 | | 1 | 3.13 | 213% larger
Decay properties
| Th-232 | U-238 half-life | 14 Gyr (-18 to 40 Gyr) | 4.47 Gyr (4.464 to 4.4745 Gyr) mean lifetime | 20.2 Gyr (-30 to 90 Gyr) | 6.45 Gyr (6.4453 to 6.4552 Gyr) decay constant | 1.57×10^-18 per second | 4.916×10^-18 per second specific activity | 4.07 kBq/g | 12.44 kBq/g width | 7.16×10^-34 eV | 3.236×10^-33 eV decay modes | α (alpha emission) | SF (spontaneous fission) | ^24Ne +^26Ne (double cluster emission) | 2β^- (double beta decay) | α (alpha emission) | SF (spontaneous fission) | 2β^- (double beta decay) final decay products | Pb-208 (100%) | Pb-206 (4×10^-9%) | Pb-204 (0%) | Hg-200 (0%) | Hg-204 (0%) | Pb-206 (100%) | Tl-205 (1.9×10^-6%) | Pb-208 (2.6×10^-9%) | W-184 (9×10^-12%) | Yb-168 (5×10^-27%) | Er-164 (4×10^-27%) | Dy-160 (2×10^-28%) | Dy-156 (1×10^-30%) | Sm-144 (1×10^-31%) | Ce-140 (1×10^-32%) | Dy-164 (0%) | Er-168 (0%) | Gd-156 (0%) | Hf-176 (0%) | Hf-180 (0%) | Sm-152 (0%) | Yb-172 (0%)