Radioactive Activity Calculator
Calculate radioactive activity from atom count
About this calculator
The Radioactive Activity Calculator determines the activity level of radioactive materials by converting atom count into measurable decay rates. This tool is essential for nuclear physics students, researchers, and professionals working with radioactive substances who need to calculate how many atoms decay per second. Understanding radioactive activity is crucial for radiation safety, medical applications, nuclear engineering, and research planning where precise measurements of radioactive decay rates are required.
How to use
Enter the number of radioactive atoms in your sample and select the specific isotope or input its decay constant. The calculator will compute the activity in becquerels (Bq) or curies (Ci) using the fundamental equation A = λN, where λ is the decay constant and N is the atom count.
Frequently asked questions
What units does this calculator use for radioactive activity?
The calculator displays results in becquerels (Bq), the SI unit for activity, and often includes curies (Ci) for reference.
How do I find the decay constant for my isotope?
Decay constants are isotope-specific values found in nuclear data tables or calculated from half-life using λ = ln(2)/t½.
What's the difference between activity and atom count?
Atom count is the total number of radioactive atoms, while activity measures how many atoms decay per second.