How is nuclear energy released?

   One of the most discussed phenomena in the scientific world is the release of nuclear energy.  According to Einstein's General Theory of Relativity, the mass defect in a nuclear reaction is converted into pure energy (the famous equation E=mc²). But how exactly is nuclear energy released?  We know that a chemical explosive releases energy when there is a rapid expansion of the material in state of solid/liquid or gas is converted into super heated gas.  So how "nuclear explosions" release energy? Now see the table below, which describes the reactions between one proton and one neutron.    Here we have two experiments; 1) Creating a deuterium nucleus by fusing one proton and one neutron. Result: a) Volume and mass of  both the particles are decreased from their original state, b) Density of both the particles remain unchanged and c) Reaction is exothermic.  When proton and neutron bond together, the particles decrease their volume because of the overlapping between them. But since, the density of the particles remain unchanged (i.e. not increased) the particles must release the overlapped volume of mass.  So, here we have to consider two facts to calculate the release of energy,  that is mass defect and volume defect.  Now, since there is simultaneous defect in mass and volume, we can conclude that the release of nuclear energy is because of the rapid huge expansion of ordinary matter (proton and neutron) to one kind of extremely low-density state of matter. Since nuclear particles have great density, the released mass will detonate violently and this detonation is the reason for the release of energy. Therefore, like a chemical explosion, the release of energy in a nuclear explosion is also because of the change in the state of matter.  Evidences for the detonation of matter; See: Star light bending and lensing effect (these two phenomena demonstrate the conversion of ordinary matter into space matter).

2) Splitting of a deuterium nucleus into one proton and one neutron. Result: a) Volume and mass of the both particles are regained, b) Density of  both the particles remain unchanged and c) Reaction is endothermic.  Since the volume and mass of the particles are regained, the particles must absorb the same amount of matter  which was previously released from its surrounding space.

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