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 nGy = 1.0000e-9 β
1 β = 1,000,000,000 nGy
例子:
将15 纳米转换为beta颗粒：
15 nGy = 1.5000e-8 β
| 纳米 | beta颗粒 |
|---|---|
| 0.01 nGy | 1.0000e-11 β |
| 0.1 nGy | 1.0000e-10 β |
| 1 nGy | 1.0000e-9 β |
| 2 nGy | 2.0000e-9 β |
| 3 nGy | 3.0000e-9 β |
| 5 nGy | 5.0000e-9 β |
| 10 nGy | 1.0000e-8 β |
| 20 nGy | 2.0000e-8 β |
| 30 nGy | 3.0000e-8 β |
| 40 nGy | 4.0000e-8 β |
| 50 nGy | 5.0000e-8 β |
| 60 nGy | 6.0000e-8 β |
| 70 nGy | 7.0000e-8 β |
| 80 nGy | 8.0000e-8 β |
| 90 nGy | 9.0000e-8 β |
| 100 nGy | 1.0000e-7 β |
| 250 nGy | 2.5000e-7 β |
| 500 nGy | 5.0000e-7 β |
| 750 nGy | 7.5000e-7 β |
| 1000 nGy | 1.0000e-6 β |
| 10000 nGy | 1.0000e-5 β |
| 100000 nGy | 0 β |
规则