Input interpretation
Am-243 | half-life
Result
7390 years (7325 to 7426 yr)
Decay properties
half-life | 7390 years (7326 to 7425 yr) mean lifetime | 10700 years (10570 to 10710 yr) decay constant | 2.98×10^-12 per second specific activity | 7.37 GBq/g (gigabecquerels per gram) width | 1.96×10^-27 eV (electronvolts) decay modes | α (alpha emission) | 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 | 230 kg (kilograms) critical diameter | 32.5 cm (centimeters) (for a uniform sphere)
Unit conversion
2.33×10^11 seconds
Comparisons as half-life
≈ ( 0.097 ≈ 1/10 ) × half-life of nickel-59 ( 2.3968×10^12 s )
≈ 1.3 × half-life of carbon-14 ( ≈ 1.8×10^11 s )