Results for “Half-Life”
3 terms
Radiocarbon Dating
Nuclear & Particle Physics
Years Before Present (BP)
A radiometric dating method that measures the residual decay activity of Carbon-14 in organic materials to determine their age up to ~50,000 years.
t = -(t_½ / ln 2) ln(A(t) / A₀), t_½ = 5730 years
Radioactive Tracer
Nuclear & Particle Physics
MBq or mCi (Administered Activity)
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)
Radon Gas Migration
Geophysics & Environmental Physics
Bq/m³ or pCi/L (Activity Concentration)
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)