Nuclear & Particle Physics

The spontaneous process by which an unstable atomic nucleus loses energy by emitting ionizing radiation (particles or electromagnetic rays).

N(t) = N₀ e^(-λ t), A(t) = λ N(t) Bq (Bequerels = decays/s) or Ci (Curies)

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)

Nuclear & Particle Physics

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

A mathematical technique in quantum field theory used to handle divergent infinite loop integrals by re-expressing parameters in terms of…

m_obs = m_bare + δm, e_obs = e_bare + δe Theoretical Technique