Paper XXIV of the Brane-Bulk Series Experimental Proposal: Positronium Gamma-Ray Cavity B. D. Jagadeesan, MD

A near-term experiment is proposed to test the brane-bulk prediction that matter/antimatter annihilation is controlled by the focal deceleration/acceleration mode interface (Paper VII). The experiment combines: (1) an active gamma-ray cavity lined with a positron-emitting radioactive uid (22Na-glycol) for continuous positronium for- mation; (2) a strong magnetic eld B0 ∼10 T aligning positronium spin states; (3) a coherent RF π-pulse at the electron Larmor frequency (~280 GHz) to prepare the spin-singlet (para-positronium) state before annihilation, enhancing two-photon 511 keV emission; (4) an external positron beam to boost positronium density. The brane-bulk prediction: the annihilation rate in a coherent spin state should show T2* dephasing enhancement consistent with the T2*/T2 hierarchy of the sump framework. Part of the One-Octonion Brane-Bulk Framework series. Anchor DOI: 10.5281/zenodo.19120873. Community: one-octonion-brane-bulk. Author: Bharathi Dasan Jagadeesan, M.D., University of Minnesota. ORCID: 0000-0002-1143-941X.