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 R = 0.6 cpm
1 cpm = 1.667 R
例子:
将15 罗恩根转换为每分钟计数:
15 R = 9 cpm
| 罗恩根 | 每分钟计数 |
|---|---|
| 0.01 R | 0.006 cpm |
| 0.1 R | 0.06 cpm |
| 1 R | 0.6 cpm |
| 2 R | 1.2 cpm |
| 3 R | 1.8 cpm |
| 5 R | 3 cpm |
| 10 R | 6 cpm |
| 20 R | 12 cpm |
| 30 R | 18 cpm |
| 40 R | 24 cpm |
| 50 R | 30 cpm |
| 60 R | 36 cpm |
| 70 R | 42 cpm |
| 80 R | 48 cpm |
| 90 R | 54 cpm |
| 100 R | 60 cpm |
| 250 R | 150 cpm |
| 500 R | 300 cpm |
| 750 R | 450 cpm |
| 1000 R | 600 cpm |
| 10000 R | 6,000 cpm |
| 100000 R | 60,000 cpm |