Pair production and annihilation                     

Pair production

The pair production process is one of the most interesting demonstrations for the presence of space matter in atomic shells. When a gamma ray photon with the energy of 1.2 MeV passes through near a heavy nucleus (that is, the innermost transitory shells) it can result the production of one electron and one positron. The quantity of space matter that closer to a heavy nucleus is equal to or more than the mass of one electron and one positron, because of its high density. When such an energetic gamma ray photon is passed through the high-density space matter region, the individual space matter units will be bonded together to produce the electron-positron pair. 

 

When a pair production occurs, the equal amount of space matter (with the mass of one electron and one positron) will be entered from outside of the atom and the natural densities of the space matter in the atomic shells will be always maintained.  

 

Annihilation of electron and positron:

When an electron and a positron react each other because of their opposite charges, the bundles of the space matter units that present in the two particles will be released and expanded. This expansion of the space matter causes the creation of two gamma rays. This is one of the examples for ordinary matter can be converted into space matter.

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