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 = 60 cpm
1 cpm = 0.017 α
例子:
将15 α颗粒转换为每分钟计数:
15 α = 900 cpm
| α颗粒 | 每分钟计数 |
|---|---|
| 0.01 α | 0.6 cpm |
| 0.1 α | 6 cpm |
| 1 α | 60 cpm |
| 2 α | 120 cpm |
| 3 α | 180 cpm |
| 5 α | 300 cpm |
| 10 α | 600 cpm |
| 20 α | 1,200 cpm |
| 30 α | 1,800 cpm |
| 40 α | 2,400 cpm |
| 50 α | 3,000 cpm |
| 60 α | 3,600 cpm |
| 70 α | 4,200 cpm |
| 80 α | 4,800 cpm |
| 90 α | 5,400 cpm |
| 100 α | 6,000 cpm |
| 250 α | 15,000 cpm |
| 500 α | 30,000 cpm |
| 750 α | 45,000 cpm |
| 1000 α | 60,000 cpm |
| 10000 α | 600,000 cpm |
| 100000 α | 6,000,000 cpm |