Radiation chemistry — IUPAC Division I physical chemistry at the ionizing-radiation / radiolysis grain. Foundations: (1) Radiation chemical yield G(X) = number of molecules of species X formed per 100 eV of energy deposited (historical…
radiation-chemistry
G-value: yield per 100 eV; charge balance G(e_aq⁻)=G(H₃O⁺)
The radiation chemical yield G(X) is the central quantitative concept in radiation chemistry: G(X) = (molecules of X formed) per (100 eV of…
Spur-track structure: LET scaling ρ_track ∝ LET; α/γ ≈ 2000/3
Spur theory (Samuel & Magee 1953, Mozumder-Magee 1966) partitions the primary radiation track into localised radical clusters of…
e_aq⁻ pseudo-first-order: [e](t) = [e₀]·exp(−k[S]t); t_½ = ln 2/k_eff
Hydrated-electron (e_aq⁻) kinetics (Hart & Boag 1962; Anbar, Bambenek & Ross, NSRDS-NBS 43 compiled rate constants). The hydrated electron…
Charge balance: G(e_aq⁻) − G(H₃O⁺) = 0 (identity under substitution)
Sympy-exact witness of the charge-conservation identity in water radiolysis. Setup: define G_bal(G_e, G_H3O) = G_e − G_H3O as the…
LET ratio: ρ_α / ρ_γ = LET_α / LET_γ = 200 / (3/10) = 2000/3 exact
Sympy-exact witness of the α / γ LET ratio using sp.Rational arithmetic. Setup: LET_α = 200 (keV/μm, representative for 5-MeV α…
e_aq⁻ half-life at k_eff=1: t_½ = log(2); concentration halves exactly
Sympy-exact witness of the pseudo-first-order half-life identity on the hydrated electron. Setup: [e_aq⁻](t) = e₀·exp(−k_eff·t) where…