First-order kinetics: N(t)=N₀e^(-λt), half-life t₁/₂=ln(2)/λ. α, β⁻, β⁺, EC, γ, internal conversion, spontaneous fission. Rutherford-Soddy 1902.
Radioactive decay law (chem)
Related concepts
- Radiometric dating
- N(t) = N₀·exp(−λt); t_{1/2} = ln 2 / λ (universal isotope clock)
- N(t_{1/2})/N₀ = 1/2; with λ=ln 2, t=1 ⇒ ratio = 1/2 exactly
- Becquerel (1896)
- Rutherford atom (1911)
- Fission (Hahn-Strassmann 1938)
- Actinides (Seaborg 1944)
- Neutron (Chadwick 1932)
- Mössbauer (1958)
- Fricke dosimeter (1929)
- Actinium (Debierne 1908)
- Water radiolysis (Spinks 1990)
- Track structure (Magee 1964)
- Radiosensitizer (Adams 1973)
- X-ray therapy (Röntgen 1895)