![]() The system is unstable: the two particles annihilate each other to predominantly produce two or three gamma-rays, depending on the relative spin states. ![]() Positronium is a system consisting of an electron and its anti-particle, a positron, bound together into an exotic atom, specifically an onium. More resourcesĪnd now for something completely different You can read the Steering Council communication about it here to learn more. ![]() In previous pre-releases but it has been postponed to Python 3.11 due to some compatibility concerns.
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