ECSM Nuclear Stability Evidence Notebook: Testing Response-Closure Predictors Against Isotope-Valley and Beta-Decay Data

This paper extends the Emergent Condensate Superfluid Medium (ECSM) framework into nuclear stability. It proposes that stable nuclei correspond to finite-response closure states, while radioactive nuclei correspond to metastable configurations with open lower-stress relaxation channels. The work interprets deuterium as a bipolar nuclear bridge, tritium as a neutron-heavy triadic branch relaxing toward helium-3, helium-4 as the first paired mirror-closed alpha response cell, and the isotope valley as a map of localised finite-response attractors. The paper is conceptual and does not replace quantitative nuclear-force calculations, but outlines a route toward future testing using isotope data, beta-decay direction, mirror-pair asymmetry, alpha closure, shell effects, and the iron–nickel binding-energy peak.