Nuclear Physics Formulas
A complete list of nuclear physics formulas, covering radioactive decay, half-life, activity, mass defect, and nuclear binding energy.
5 formulas. Use the interactive searcher to solve for any variable and convert units.
Open the interactive searcher →Radioactive decay
N = N₀·e^(−λ·t)
N number remainingN₀ initial numberλ decay constant1/st times
Half-life
t½ = ln2 / λ
t½ half-lifesλ decay constant1/s
Activity
A = λ·N
A activityBqλ decay constant1/sN number of nuclei
Mass defect energy
E = Δm·c²
E binding energyJΔm mass defectkgc speed of lightm/s
Binding energy per nucleon
BE/A = (Δm·c²) / A
BE binding energyJΔm mass defectkgc speed of lightm/sA mass number