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 cps
1 cps = 1 FP
例子:
将15 裂变产品转换为每秒计数：
15 FP = 15 cps
| 裂变产品 | 每秒计数 |
|---|---|
| 0.01 FP | 0.01 cps |
| 0.1 FP | 0.1 cps |
| 1 FP | 1 cps |
| 2 FP | 2 cps |
| 3 FP | 3 cps |
| 5 FP | 5 cps |
| 10 FP | 10 cps |
| 20 FP | 20 cps |
| 30 FP | 30 cps |
| 40 FP | 40 cps |
| 50 FP | 50 cps |
| 60 FP | 60 cps |
| 70 FP | 70 cps |
| 80 FP | 80 cps |
| 90 FP | 90 cps |
| 100 FP | 100 cps |
| 250 FP | 250 cps |
| 500 FP | 500 cps |
| 750 FP | 750 cps |
| 1000 FP | 1,000 cps |
| 10000 FP | 10,000 cps |
| 100000 FP | 100,000 cps |
规则