V.D36 — Recombination orbit depth

The recombination orbit depth n_rec is the orbit depth on tau^1 at which the omega-sector binding energy (Higgs/mass mechanism) exceeds the gamma-sector photon energy for hydrogen-like boundary characters. At n_rec photons decouple and become free-streaming null intertwiners; z_rec ~ 1100 is reproduced from iota_tau-derived sector couplings.