放射性是不稳定原子核因辐射失去能量的过程。它以Becquerels（BQ）进行测量。
1 n/cm²/s = 1 β
1 β = 1 n/cm²/s
例子:
将15 中子通量转换为beta颗粒：
15 n/cm²/s = 15 β
| 中子通量 | beta颗粒 |
|---|---|
| 0.01 n/cm²/s | 0.01 β |
| 0.1 n/cm²/s | 0.1 β |
| 1 n/cm²/s | 1 β |
| 2 n/cm²/s | 2 β |
| 3 n/cm²/s | 3 β |
| 5 n/cm²/s | 5 β |
| 10 n/cm²/s | 10 β |
| 20 n/cm²/s | 20 β |
| 30 n/cm²/s | 30 β |
| 40 n/cm²/s | 40 β |
| 50 n/cm²/s | 50 β |
| 60 n/cm²/s | 60 β |
| 70 n/cm²/s | 70 β |
| 80 n/cm²/s | 80 β |
| 90 n/cm²/s | 90 β |
| 100 n/cm²/s | 100 β |
| 250 n/cm²/s | 250 β |
| 500 n/cm²/s | 500 β |
| 750 n/cm²/s | 750 β |
| 1000 n/cm²/s | 1,000 β |
| 10000 n/cm²/s | 10,000 β |
| 100000 n/cm²/s | 100,000 β |
规则