decay modes of Cf-238 vs Se-70

Cf-238 Se-70 | decay modes

Cf-238 | SF (spontaneous fission) | α (alpha emission) | β^+ (positron emission) Se-70 | β^+ (positron emission)

| Cf-238 | Se-70 half-life | 21.1 ms (19.77 to 22.43 ms) | 41.17 min (40.76 to 41.45 min) mean lifetime | 30.4 ms (28.54 to 32.35 ms) | 59.33 min (58.8 to 59.78 min) decay constant | 32.9 per second | 2.809×10^-4 per second specific activity | 8.32×10^10 TBq/g | 2.419×10^6 TBq/g width | 2.16×10^-14 eV | 1.85×10^-19 eV decay modes | SF (spontaneous fission) | α (alpha emission) | β^+ (positron emission) | β^+ (positron emission) final decay products | Pb-206 (0.09%) | Tl-205 (2×10^-9%) | Pb-208 (4×10^-12%) | W-184 (8×10^-15%) | Ce-140 (0%) | Dy-156 (0%) | Dy-160 (0%) | Dy-164 (0%) | Er-164 (0%) | Er-168 (0%) | Gd-156 (0%) | Hf-176 (0%) | Hf-180 (0%) | Sm-144 (0%) | Sm-152 (0%) | Yb-168 (0%) | Yb-172 (0%) | Ge-70 (100%)

decay mode | SF (spontaneous fission) branching ratio | 100% decay mode | α (alpha emission) branching ratio | 0.2% Q-value | 8.055 MeV (megaelectronvolts) daughter nuclide | Cm-234 decay mode | β^+ (positron emission) Q-value | 1.893 MeV (megaelectronvolts) daughter nuclide | Bk-238

decay mode | β^+ (positron emission) branching ratio | 100% Q-value | 1.2747 MeV (megaelectronvolts) daughter nuclide | As-70