USP Field Theory — Proton–Neutron Balance (Extended v3, with Environmental Neutron Role)

This release presents the Proton–Neutron Balance framework in USP Field Theory, refined with the concept of neutrons as environmental balance agents. Protons act as stable oscillators, with frequency approximately c / (2πr), giving fp around 10^19 Hz at radius 10^-15 m. Stability occurs when the electron–proton mismatch (Δf_e-p) is close to zero, defining hydrogen as the fundamental identity. Neutrons buffer resonance mismatches in high-gravity corridors, with the required neutron number scaling as N_required ∝ γ_g. This stabilizes ultra-atoms under compression. Collapse Flow: Protons → Neutrons → Ultra-Atoms (helium/neon) → Relaxation to hydrogen/helium/neon, or collapse into non-resonant dark matter. Predictions: Jets from neutron stars are initially neutron-rich, then transition to hydrogen lines. Transient isotope signatures (e.g. helium and neon) may appear in early spectra. Dark matter may consist of collapsed, non-resonant proton remnants. This release includes a Δf Threshold Table and a visual collapse diagram, linking nuclear stability, neutron enrichment, and cosmic evolution under the USP Frequency–Radius Law.