Apply the radioactive decay law to find remaining activity from an initial value, half-life and elapsed time. For nuclear physics study and radiation protection estimates.
初始活度随时间衰减。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Decay law | N(t) = N₀e^(−λt) | Rutherford & Soddy 1902 |
| Activity | A(t) = λN(t) | Nuclear physics |
| Half-life relation | T₁/₂ = ln 2 / λ | Decay kinetics |
| Mean life | τ = 1/λ = T₁/₂/ln2 | Statistical decay |
| Unit conversion | 1 Ci = 3.7×10¹⁰ Bq | SI units |
| Decay chains | Bateman equations for chains | Bateman 1910 |
工作与生活中的相关计算与查询。