Input interpretation
Cm-240 Pb-183 | half-life
Results
Cm-240 | 27 days (25.5 to 28.4 days) Pb-183 | 535 ms (milliseconds) (504.3 to 565.7 ms)
Units
Relative values
| visual | ratios | | comparisons Pb-183 | | 2.3×10^-7 | 1 | 99.999977% smaller Cm-240 | | 1 | 4.3×10^6 | 4.3×10^8% larger
Decay properties
| Cm-240 | Pb-183 half-life | 27 days (25.6 to 28.4 days) | 535 ms (504.4 to 565.6 ms) mean lifetime | 39 days (37.2 to 43 days) | 772 ms (727.8 to 815.9 ms) decay constant | 2.9×10^-7 per second | 1.3 per second specific activity | 740 TBq/g | 4.26×10^9 TBq/g width | 2×10^-22 eV | 8.53×10^-16 eV decay modes | α (alpha emission) | ϵ (electron capture) | SF (spontaneous fission) | α (alpha emission) | β^+ (positron emission) final decay products | Pb-208 (100%) | Pb-206 (4×10^-9%) | Hg-204 (5×10^-12%) | Pb-204 (0%) | Hg-200 (0%) | Hf-179 (30%) | Yb-171 (30%) | Lu-175 (9%) | W-183 (9%) | Er-167 (0.5%) | Hf-178 (0.12%) | Yb-170 (0.01%) | Dy-163 (2×10^-4%) | W-182 (3×10^-5%) | Er-166 (2×10^-8%) | Tb-159 (2×10^-10%) | Yb-174 (0%)