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 FP = 1 n/cm²/s
1 n/cm²/s = 1 FP
例子:
将15 裂变产品转换为中子通量：
15 FP = 15 n/cm²/s
| 裂变产品 | 中子通量 |
|---|---|
| 0.01 FP | 0.01 n/cm²/s |
| 0.1 FP | 0.1 n/cm²/s |
| 1 FP | 1 n/cm²/s |
| 2 FP | 2 n/cm²/s |
| 3 FP | 3 n/cm²/s |
| 5 FP | 5 n/cm²/s |
| 10 FP | 10 n/cm²/s |
| 20 FP | 20 n/cm²/s |
| 30 FP | 30 n/cm²/s |
| 40 FP | 40 n/cm²/s |
| 50 FP | 50 n/cm²/s |
| 60 FP | 60 n/cm²/s |
| 70 FP | 70 n/cm²/s |
| 80 FP | 80 n/cm²/s |
| 90 FP | 90 n/cm²/s |
| 100 FP | 100 n/cm²/s |
| 250 FP | 250 n/cm²/s |
| 500 FP | 500 n/cm²/s |
| 750 FP | 750 n/cm²/s |
| 1000 FP | 1,000 n/cm²/s |
| 10000 FP | 10,000 n/cm²/s |
| 100000 FP | 100,000 n/cm²/s |
规则