Radioactivity is the process by which an unstable atomic nucleus loses energy by radiation. It is measured in becquerels (Bq).
1 t½ = 60 cpm
1 cpm = 0.017 t½
उदाहरण:
कन्वर्ट 15 Half-life से Counts per Minute:
15 t½ = 900 cpm
| Half-life | Counts per Minute |
|---|---|
| 0.01 t½ | 0.6 cpm |
| 0.1 t½ | 6 cpm |
| 1 t½ | 60 cpm |
| 2 t½ | 120 cpm |
| 3 t½ | 180 cpm |
| 5 t½ | 300 cpm |
| 10 t½ | 600 cpm |
| 20 t½ | 1,200 cpm |
| 30 t½ | 1,800 cpm |
| 40 t½ | 2,400 cpm |
| 50 t½ | 3,000 cpm |
| 60 t½ | 3,600 cpm |
| 70 t½ | 4,200 cpm |
| 80 t½ | 4,800 cpm |
| 90 t½ | 5,400 cpm |
| 100 t½ | 6,000 cpm |
| 250 t½ | 15,000 cpm |
| 500 t½ | 30,000 cpm |
| 750 t½ | 45,000 cpm |
| 1000 t½ | 60,000 cpm |
| 10000 t½ | 600,000 cpm |
| 100000 t½ | 6,000,000 cpm |