La radiactividad es el proceso por el cual un núcleo atómico inestable pierde energía por radiación.Se mide en Becquerels (BQ).
1 R = 0.01 n/cm²/s 
1 n/cm²/s = 100 R 
Ejemplo: 
Convertir 15 Rogado a Flujo de neutrones:
15 R = 0.15 n/cm²/s 
| Rogado | Flujo de neutrones | 
|---|---|
| 0.01 R | 0 n/cm²/s | 
| 0.1 R | 0.001 n/cm²/s | 
| 1 R | 0.01 n/cm²/s | 
| 2 R | 0.02 n/cm²/s | 
| 3 R | 0.03 n/cm²/s | 
| 5 R | 0.05 n/cm²/s | 
| 10 R | 0.1 n/cm²/s | 
| 20 R | 0.2 n/cm²/s | 
| 30 R | 0.3 n/cm²/s | 
| 40 R | 0.4 n/cm²/s | 
| 50 R | 0.5 n/cm²/s | 
| 60 R | 0.6 n/cm²/s | 
| 70 R | 0.7 n/cm²/s | 
| 80 R | 0.8 n/cm²/s | 
| 90 R | 0.9 n/cm²/s | 
| 100 R | 1 n/cm²/s | 
| 250 R | 2.5 n/cm²/s | 
| 500 R | 5 n/cm²/s | 
| 750 R | 7.5 n/cm²/s | 
| 1000 R | 10 n/cm²/s | 
| 10000 R | 100 n/cm²/s | 
| 100000 R | 1,000 n/cm²/s |