Input interpretation
Cm-240 | half-life
Result
27 days (25.5 to 28.4 days)
Decay properties
half-life | 27 days (25.6 to 28.4 days) mean lifetime | 39 days (37.2 to 43 days) decay constant | 2.9×10^-7 per second specific activity | 740 TBq/g (terabecquerels per gram) width | 2×10^-22 eV (electronvolts) decay modes | α (alpha emission) | ϵ (electron capture) | SF (spontaneous fission) final decay products | Pb-208 (100%) | Pb-206 (4×10^-9%) | Hg-204 (5×10^-12%) | Pb-204 (0%) | Hg-200 (0%)
Unit conversions
2.3×10^6 seconds
38000 minutes
640 hours
3.8 weeks
0.88 months
Comparisons as half-life
≈ ( 0.014 ≈ 1/72 ) × half-life of cobalt-60 ( 1.6635×10^8 s )
≈ ( 0.028 ≈ 1/36 ) × half-life of sodium-22 ( 8.2108×10^7 s )