Why are X-rays Emitted when electrons are focused on Heavy metals
During X-ray emission, the kinetic energy of a photon is converted into X-rays.A fast moving electron knocks out an inner electron from an atom of the target element. A vacancy is created, an electron from filled higher energy level jumps into the vacancy and the excess energy is released as a photon. This process produces characteristic X-rays.
If the vacancy is created in K shell and electron from the L shell fills the vacancy then the emitted photon is a Kα – X-ray. If a vacancy is created in the K-shell and an electron from the M shell fills this vacancy then the X-ray emitted is known as a kβ X-ray.
So, characteristic x-rays are emitted from heavy elements when their electrons make transitions between the lower atomic energy levels.
Heavy metals which are used have following characteristics:
- High atomic
- Ability to maintain its strength at high temperatures
- High melting point
- Relatively low rate of evaporation.
You have rated this answer /10