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Results for “Half-Life”

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Nuclear & Particle Physics

Radiocarbon Dating

A radiometric dating method that measures the residual decay activity of Carbon-14 in organic materials to determine their age up to…

t = -(t_½ / ln 2) ln(A(t) / A₀), t_½ = 5730 years Years Before Present (BP) Nuclear & Particle Physics

Radioactive Tracer

A chemical compound containing a radioisotope used to trace chemical or biological pathways through living organisms or industrial systems.

A(t) = A₀ e^(-λ t) (Short half-life diagnostic radiopharmaceutical) MBq or mCi (Administered Activity) Geophysics & Environmental Physics

Radon Gas Migration

The environmental migration of radioactive Radon-222 gas from decaying uranium in rocks and soil into indoor building spaces.

Decay Chain: ²³⁸U → ²²⁶Ra → ²²²Rn (Half-life = 3.82 days) Bq/m³ or pCi/L (Activity Concentration)