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