Prompt Gamma Activation Analysis (PGAA) employs neutron irradiation of a sample to excite atomic nuclei, triggering the emission of characteristic gamma rays within nanoseconds of neutron capture or ...
For more than a decade, physicists hunting dark matter in the Milky Way’s core kept circling the same clue: a faint glow of gamma rays peaking around 2 GeV, maddeningly ambiguous, never quite proving ...
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