Nuclear physics · Closed-form
Exponential decay
N(t), activity
Exponential decay
- λ
- 0.0693147
- N(t)
- 500000
- Activity
- 34657.4
Closed-form or algebraic result. Invalid inputs show an error. Check against your own derivation. FrameCalc is educational software. Results are for study and comparison, not medical, radiation-protection, or engineering sign-off. Fusion tools are models, not device predictions. Accuracy · Legal