Input interpretation
At-219 Pr-157 | half-life
Results
At-219 | 56 seconds (52.4 to 59.6 s) Pr-157 | 300 ms (milliseconds)
Units
Relative values
| visual | ratios | | comparisons Pr-157 | | 0.005 | 1 | 99.5% smaller At-219 | | 1 | 190 | 19000% larger
Decay properties
| At-219 | Pr-157 half-life | 56 s (52.5 to 59.5 s) | 300 ms mean lifetime | 81 s (75.8 to 85.8 s) | 433 ms decay constant | 0.012 per second | 2.31 per second specific activity | 3.4×10^7 TBq/g | 8.86×10^9 TBq/g width | 8.1×10^-18 eV | 1.52×10^-15 eV decay modes | α (alpha emission) | β^- (electron emission) | β^- (electron emission) final decay products | Pb-207 (100%) | Gd-157 (0%)