放射能は、不安定な原子核が放射によってエネルギーを失うプロセスです。Beckerels（BQ）で測定されます。
1 cpm = 0.017 n/cm²/s
1 n/cm²/s = 60 cpm
例:
15 毎分カウントを中性子流束に変換します。
15 cpm = 0.25 n/cm²/s
| 毎分カウント | 中性子流束 |
|---|---|
| 0.01 cpm | 0 n/cm²/s |
| 0.1 cpm | 0.002 n/cm²/s |
| 1 cpm | 0.017 n/cm²/s |
| 2 cpm | 0.033 n/cm²/s |
| 3 cpm | 0.05 n/cm²/s |
| 5 cpm | 0.083 n/cm²/s |
| 10 cpm | 0.167 n/cm²/s |
| 20 cpm | 0.333 n/cm²/s |
| 30 cpm | 0.5 n/cm²/s |
| 40 cpm | 0.667 n/cm²/s |
| 50 cpm | 0.833 n/cm²/s |
| 60 cpm | 1 n/cm²/s |
| 70 cpm | 1.167 n/cm²/s |
| 80 cpm | 1.333 n/cm²/s |
| 90 cpm | 1.5 n/cm²/s |
| 100 cpm | 1.667 n/cm²/s |
| 250 cpm | 4.167 n/cm²/s |
| 500 cpm | 8.333 n/cm²/s |
| 750 cpm | 12.5 n/cm²/s |
| 1000 cpm | 16.667 n/cm²/s |
| 10000 cpm | 166.667 n/cm²/s |
| 100000 cpm | 1,666.667 n/cm²/s |
Inayam