Compute the probability that a nucleus has not yet decayed from decay constant and elapsed time. For quick estimates of half-life, remaining activity and decay progress.
输入衰变常数 λ 与时间 t,求核素存活概率。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Survival probability | P(t) = e^(−λt) = 2^(−t/T₁/₂) | Exponential statistics |
| Decay probability | 1 − P(t) | Decay law |
| Poisson statistics | Counting fluctuation σ = √N | Radioactive counting |
| Half-life meaning | P(T₁/₂) = 0.5 | Decay kinetics |
| Long-term survival | <0.1% after 10 half-lives | Radiochemistry convention |
| Single atom | Decay time unpredictable per atom | QM statistical nature |