SPECTRAL FINGERPRINT. “In astrophysically plausible cases of the interaction of neutral atmospheres or winds from antistars with ionized interstellar gas, the hadronic annihilation will be preceeded by the formation of excited ̄ and He ̄ atoms. These atoms rapidly cascade down to low levels prior to annihilation giving rise to a series of narrow lines which can be associated with the hadronic annihilation gamma-ray emission.”””h
https://lnkd.in/d_CXigJS