Radioactivity is the process by which an unstable atomic nucleus loses energy by radiation. It is measured in becquerels (Bq).
1 rem = 0.01 γ 
1 γ = 100 rem 
उदाहरण: 
कन्वर्ट 15 Rem से Gamma Radiation:
15 rem = 0.15 γ 
| Rem | Gamma Radiation | 
|---|---|
| 0.01 rem | 0 γ | 
| 0.1 rem | 0.001 γ | 
| 1 rem | 0.01 γ | 
| 2 rem | 0.02 γ | 
| 3 rem | 0.03 γ | 
| 5 rem | 0.05 γ | 
| 10 rem | 0.1 γ | 
| 20 rem | 0.2 γ | 
| 30 rem | 0.3 γ | 
| 40 rem | 0.4 γ | 
| 50 rem | 0.5 γ | 
| 60 rem | 0.6 γ | 
| 70 rem | 0.7 γ | 
| 80 rem | 0.8 γ | 
| 90 rem | 0.9 γ | 
| 100 rem | 1 γ | 
| 250 rem | 2.5 γ | 
| 500 rem | 5 γ | 
| 750 rem | 7.5 γ | 
| 1000 rem | 10 γ | 
| 10000 rem | 100 γ | 
| 100000 rem | 1,000 γ |