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 n/cm²/s = 100 R
1 R = 0.01 n/cm²/s
例:
15 中性子流束をRoentgenに変換します。
15 n/cm²/s = 1,500 R
| 中性子流束 | Roentgen |
|---|---|
| 0.01 n/cm²/s | 1 R |
| 0.1 n/cm²/s | 10 R |
| 1 n/cm²/s | 100 R |
| 2 n/cm²/s | 200 R |
| 3 n/cm²/s | 300 R |
| 5 n/cm²/s | 500 R |
| 10 n/cm²/s | 1,000 R |
| 20 n/cm²/s | 2,000 R |
| 30 n/cm²/s | 3,000 R |
| 40 n/cm²/s | 4,000 R |
| 50 n/cm²/s | 5,000 R |
| 60 n/cm²/s | 6,000 R |
| 70 n/cm²/s | 7,000 R |
| 80 n/cm²/s | 8,000 R |
| 90 n/cm²/s | 9,000 R |
| 100 n/cm²/s | 10,000 R |
| 250 n/cm²/s | 25,000 R |
| 500 n/cm²/s | 50,000 R |
| 750 n/cm²/s | 75,000 R |
| 1000 n/cm²/s | 100,000 R |
| 10000 n/cm²/s | 1,000,000 R |
| 100000 n/cm²/s | 10,000,000 R |
Inayam