The energy levels of the two particles are similar to that of the hydrogen atom (which is a bound state of a proton and an electron). 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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