Here we discus two experiments: 1) Creating a deuterium nucleus by fusing one proton and one neutron together. Result: a) Volume and mass of the both particles are decreased from their individual states, b) Densities of the both particles are remaining unchanged, c) Reaction is exothermic. In the bond making, the particles overlap each other. As the densities of the particles are remaining unchanged, the particles must release the overlapped volume of mass to the outer world. Since the nuclear particles have great density, the released mass will detonate and become to space matter*. As this detonation is taking place from the region that the particles are bonded, the product nucleus act as a projectile with great kinetic energy. 2) Splitting of a deuterium nucleus into one proton and one neutron. Result: a) Volume and mass of the both particles are regained, b) Densities of the both particles are remaining unchanged, c) Reaction is endothermic. In the bond breaking, the particles absorb energy for the splitting. At the same time, the both particles absorb the same amount of masses that previously released, from their surroundings, for regaining their masses and volumes. We can calculate the releasing of energy in a nuclear reaction by knowing the expansion ratio from the nuclear density for the given mass defect. www.physics-edu.org
