Input interpretation
Al-21 | half-life
Result
35 ns (nanoseconds) (0 to 39 ns)
Decay properties
half-life | 35 ns (nanoseconds) (0 to 39 ns) mean lifetime | 50 ns (nanoseconds) (-6.675×10^-299 to 51.4 ns) decay constant | 2×10^7 per second specific activity | 5.7×10^17 TBq/g (terabecquerels per gram) width | 1.3×10^-8 eV (electronvolts) decay modes | p (proton emission) final decay products | F-19 (0%) | Ne-20 (0%) | O-16 (0%)
Unit conversions
0.035 µs (microseconds)
3.5×10^-8 seconds
Comparisons as half-life
≈ ( 0.25 ≈ 1/4 ) × half-life of a positron ( ≈ 1.4×10^-7 s )
≈ half-life of the long-lived neutral kaon ( ≈ 3.54×10^-8 s )
≈ 1.9 × half-life of the charged pion ( ≈ 1.8×10^-8 s )