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 cps = 0 C/kg
1 C/kg = 3,876 cps
例子:
将15 每秒计数转换为暴露（C/kg）：
15 cps = 0.004 C/kg
| 每秒计数 | 暴露（C/kg） |
|---|---|
| 0.01 cps | 2.5800e-6 C/kg |
| 0.1 cps | 2.5800e-5 C/kg |
| 1 cps | 0 C/kg |
| 2 cps | 0.001 C/kg |
| 3 cps | 0.001 C/kg |
| 5 cps | 0.001 C/kg |
| 10 cps | 0.003 C/kg |
| 20 cps | 0.005 C/kg |
| 30 cps | 0.008 C/kg |
| 40 cps | 0.01 C/kg |
| 50 cps | 0.013 C/kg |
| 60 cps | 0.015 C/kg |
| 70 cps | 0.018 C/kg |
| 80 cps | 0.021 C/kg |
| 90 cps | 0.023 C/kg |
| 100 cps | 0.026 C/kg |
| 250 cps | 0.064 C/kg |
| 500 cps | 0.129 C/kg |
| 750 cps | 0.193 C/kg |
| 1000 cps | 0.258 C/kg |
| 10000 cps | 2.58 C/kg |
| 100000 cps | 25.8 C/kg |
规则