antiprotonic atom

antiprotonic atom

[‚an·tē·prō′tän·ik ′ad·əm]
(atomic physics)
An atom consisting of an ordinary nucleus with an orbiting antiproton.
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Objective: Antiprotons, stored and cooled at low energies in a storage ring or at rest in traps, are highly desirable for the investigation of basic questions on fundamental interactions, the static structure of antiprotonic atoms, CPT tests by high-resolution spectroscopy on antihydrogen, as well as gravity experiments.