Radioactivity is the process by which an unstable atomic nucleus loses energy by radiation. It is measured in becquerels (Bq).
1 t½ = 1 Bq 
1 Bq = 1 t½ 
उदाहरण: 
कन्वर्ट 15 Half-life से Becquerel:
15 t½ = 15 Bq 
| Half-life | Becquerel | 
|---|---|
| 0.01 t½ | 0.01 Bq | 
| 0.1 t½ | 0.1 Bq | 
| 1 t½ | 1 Bq | 
| 2 t½ | 2 Bq | 
| 3 t½ | 3 Bq | 
| 5 t½ | 5 Bq | 
| 10 t½ | 10 Bq | 
| 20 t½ | 20 Bq | 
| 30 t½ | 30 Bq | 
| 40 t½ | 40 Bq | 
| 50 t½ | 50 Bq | 
| 60 t½ | 60 Bq | 
| 70 t½ | 70 Bq | 
| 80 t½ | 80 Bq | 
| 90 t½ | 90 Bq | 
| 100 t½ | 100 Bq | 
| 250 t½ | 250 Bq | 
| 500 t½ | 500 Bq | 
| 750 t½ | 750 Bq | 
| 1000 t½ | 1,000 Bq | 
| 10000 t½ | 10,000 Bq | 
| 100000 t½ | 100,000 Bq |