Coupled Q-Interaction Collapse and Nuclear Kinetics: Covariant Force Balance and a Two-Way Thermodynamic Benchmark

Paper III of the Early Black-Hole Formation Series couples a quadratic conserved-current stress to relativistic shell dynamics and a light-nucleus reaction network. An exact radiation–Q solution and an isothermal weak-field virial calculation serve as controls. In the homogeneous core at initial baryon density 10²⁵ cm⁻³ and initial Q energy fraction 2/3, feeding the evolving composition back into the stress advances the tracked shell’s marginal event by 24.46 ms and raises its endpoint kBT by 0.341 keV. The direct p + n + n ↔ t + γ channel gives a tritium change of order 10⁻²² per baryon in that model. The results apply to the thermally closed benchmark with fixed nuclear charge fraction. The accompanying archive includes the XeLaTeX source, figure, calculation code, and numerical outputs.