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Expert-verifiedIn both D-D reactions in equation (11-18). Two deuterons fuse to produce two particles, a nucleus of and a free nucleon. Mass decreases because the binding energy of the A=3 nucleus is greater than the combined binding energies of the two deuterons. The binding energy of helium -4 is even greater still. Why can't the deuterons simply fuse into a helium -4 nucleus and nothing else? Why must multiple particles be produced?
We need a multiple-particle process, so that the extra particle could carry away the excess energy.
Brass is an alloy of copper and zinc. Given that is higher than the or at room temperature and drops much slower with a decrease in temperature.
Nuclear fission, subdivision of a heavy atomic nucleus, such as that of uranium or plutonium, is into two fragments of roughly equal mass.
Suppose tile reaction of two deuterons going into single helium-4 did happen, and then choose a reference frame where the single helium-4 particle would be rest.
Initially, the energy equals to the mass energy of the two deuterons and their kinetic energies.
Finally, the energy is only the mass-energy of the helium-4 . Since the mass of two deuterons is bigger than the mass of the helium- 4 , the energy is not conserved.
Thus we need a multiple-particle process, so that the extra particle could carry away the excess energy.
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