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 α = 1,000 mGy
1 mGy = 0.001 α
例子:
将15 α颗粒转换为毫克：
15 α = 15,000 mGy
| α颗粒 | 毫克 |
|---|---|
| 0.01 α | 10 mGy |
| 0.1 α | 100 mGy |
| 1 α | 1,000 mGy |
| 2 α | 2,000 mGy |
| 3 α | 3,000 mGy |
| 5 α | 5,000 mGy |
| 10 α | 10,000 mGy |
| 20 α | 20,000 mGy |
| 30 α | 30,000 mGy |
| 40 α | 40,000 mGy |
| 50 α | 50,000 mGy |
| 60 α | 60,000 mGy |
| 70 α | 70,000 mGy |
| 80 α | 80,000 mGy |
| 90 α | 90,000 mGy |
| 100 α | 100,000 mGy |
| 250 α | 250,000 mGy |
| 500 α | 500,000 mGy |
| 750 α | 750,000 mGy |
| 1000 α | 1,000,000 mGy |
| 10000 α | 10,000,000 mGy |
| 100000 α | 100,000,000 mGy |
规则