Input interpretation
Cm-243 | half-life
Result
29.1 years (28.7 to 29.26 yr)
Decay properties
half-life | 29.1 years (28.8 to 29.26 yr) mean lifetime | 41.9 years (41.6 to 42.4 yr) decay constant | 7.58×10^-10 per second specific activity | 1.88 TBq/g (terabecquerels per gram) width | 4.97×10^-25 eV (electronvolts) decay modes | α (alpha emission) | ϵ (electron capture) | SF (spontaneous fission) final decay products | Pb-207 (100%) | Tl-205 (9×10^-8%) | Pb-206 (8×10^-10%) | Pb-208 (1×10^-12%)
Critical properties
critical mass | 8.67 kg (kilograms) critical diameter | 10.5 cm (centimeters) (for a uniform sphere)
Unit conversions
10600 days
255000 hours
1.53×10^7 minutes
9.18×10^8 seconds
Comparisons as half-life
≈ 5.5 × half-life of cobalt-60 ( 1.6635×10^8 s )
≈ 11 × half-life of sodium-22 ( 8.2108×10^7 s )