s-process σ·N = const: N₂/N₁ = σ₁/σ₂ (canonical invariant along s-only path)

Layer 2 — Chemistryin the cosmochemistry subtree

Sympy-exact witness of the s-process local-equilibrium product invariance σ·N = const. Setup: σ_1, σ_2 (n, γ) neutron-capture cross sections; N_1, N_2 isotope abundances; all declared positive. Starting point: in steady state along the…

Related concepts

s-process framework: σ·N = const along s-only path (slow neutron capture local equilibrium)
s- and r-process nucleosynthesis

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