Calcolatore Energia di Legame per Nucleone — Formula
## Radioactive Activity
Activity is the rate of radioactive disintegrations per second. One Becquerel (Bq) equals one disintegration per second.
### Formula
**A = lambda × N = (ln2 / t½) × N**
where lambda is the decay constant and N is the number of radioactive atoms. The older unit Curie: 1 Ci = 3.7 × 10¹⁰ Bq (the activity of 1 gram of Ra-226).
Activity is the rate of radioactive disintegrations per second. One Becquerel (Bq) equals one disintegration per second.
### Formula
**A = lambda × N = (ln2 / t½) × N**
where lambda is the decay constant and N is the number of radioactive atoms. The older unit Curie: 1 Ci = 3.7 × 10¹⁰ Bq (the activity of 1 gram of Ra-226).
Esempio Risolto
10¹⁵ atoms of an isotope with half-life 3600 seconds (1 hour).
- lambda = ln(2) / 3600 = 1.925 × 10⁻⁴ s⁻¹
- A = 1.925 × 10⁻⁴ × 10¹⁵ = 1.925 × 10¹¹ Bq
- A = 1.925 × 10¹¹ / 3.7 × 10¹⁰ = 5.20 Ci