In pair production, a photon must possess a minimum energy of 1.022 MeV to create an electron-positron pair, which corresponds to the rest mass energy of the pair. When an electron and positron annihilate, they produce at least two gamma rays, each with an energy of approximately 0.511 MeV. The total energy involved in pair production includes both the rest mass energy and any additional kinetic energy of the photon. Pair production can occur in a vacuum, but the presence of an atom typically facilitates the process.
PREREQUISITESPhysicists, students of particle physics, and anyone interested in the mechanisms of particle interactions and energy transformations in high-energy physics.
One needs a photon of an energy equivalent to at least the rest energy of the electron-positron pair, i.e., 1.022 MeV, in which case the electron and positron don't wander too far from the atom. The positron would anihilate, and the electron (with others) would find a way to fill the hole left by the annihilated electron.HarryDaniels said:In pair production, what is the formula for the energy of an electron or positron of this conversion.
Also, what is the wavelength of a photon that can create an electron positron pair.