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I have discussed the fusion between Uranium and Deuterium in the physics society. During the discussion I have read that Uranium and Deuterium applies an energy bonding to become to Plutonium. Why energy come into being during the bonding between Uranium and Deuterium? I suppose that Uranium and Deuterium have to get a stimulated state to come to a bonding, as atoms keep the low-energy state by nature. And when atoms attend a bonding, they are stimulated. That is my supposition.