The cloud chamber experiments revealed that a Photon can give up its energy to materialize as two electrons of opposite charge. Certainly the Photon must have an energy of atleast 2mₑc² in order to produce a pair.
No photon, regardless of its energy, can produce a pair in a perfect vacuum.
Pair Production is strictly an Electromagnetic Process. It seems to occur mostly in the intense electric field near the nucleus rather than inside the nucleus.
At higher energies or with heavy targets it is typically reasonable to ignore the energy transferred to target, so that nearly all energy from Photon goes to electron-positron pair.
Energy equation
holds approximately.
mₑc²→ rest energy of each electron
E1, E2 → Kinetic Energies of particles
The heavier the target, the more nearly the equation is satisfied.
Pair Production can occur in the vicinity of an electron.
No photon, regardless of its energy, can produce a pair in a perfect vacuum.
Pair Production is strictly an Electromagnetic Process. It seems to occur mostly in the intense electric field near the nucleus rather than inside the nucleus.
At higher energies or with heavy targets it is typically reasonable to ignore the energy transferred to target, so that nearly all energy from Photon goes to electron-positron pair.
Energy equation
h𝜈 → 2mₑc²+E1+E2
holds approximately.
mₑc²→ rest energy of each electron
E1, E2 → Kinetic Energies of particles
The heavier the target, the more nearly the equation is satisfied.
Pair Production can occur in the vicinity of an electron.
No comments:
Post a Comment