放射性活度计算器 — 公式
## Radioactive Activity
Activity measures the rate of radioactive decays per unit time.
### Formula
**A = lambda * N = (ln2 / t_half) * N**
where lambda is the decay constant, N is the number of atoms, and t_half is the half-life. The unit is becquerel (Bq) = 1 decay/second.
Activity measures the rate of radioactive decays per unit time.
### Formula
**A = lambda * N = (ln2 / t_half) * N**
where lambda is the decay constant, N is the number of atoms, and t_half is the half-life. The unit is becquerel (Bq) = 1 decay/second.
计算示例
1 x 10^20 atoms with a half-life of 3600 s (1 hour).
- lambda = ln(2) / t_half = 0.6931 / 3600 = 1.925e-4 /s
- A = lambda * N = 1.925e-4 * 1e20
- A = 1.925e16 Bq
- A = 1.925e16 / 3.7e10 = 520,270 Ci