What Is Lead Shielding?

In terms of radiation shielding technology, shielding protection and distance protection principles can be adopted. Shielding refers to the use of substances with a high atomic number, usually lead or lead-containing substances, as a barrier to absorb unnecessary X-rays.

For radiation inspectors, the main consideration is external exposure.

Common shielding materials for X-rays are lead plates and concrete walls, or

Design shielding material to shield rays. The magnitude of a material's ability to absorb photons, that is, the shielding effect, depends on the probability of the photoelectric effect and Compton effect occurring between the incident photon and the material.

When designing the shielding material, consider the photoelectric absorption cross section. When the energy of the incident photon is enough to cause a K electron on the nucleus of the absorbing substance to escape from the atom, causing resonance absorption, the absorption coefficient at this energy increases suddenly, this energy is called the K absorption limit. Therefore, in addition to increasing the density of the material, the number of electrons outside the nucleus that absorb atoms, the size of the orbital electron level and the number of energy levels, and the distribution of orbital electrons also affect the absorption performance of the material.

The intensity of the radiation will decrease when it penetrates the material. A certain thickness of shielding material can reduce the intensity of the radiation. Setting a sufficiently thick shield (shielding material) between the radiation source and the human body can reduce the radiation level and make people work The received dose is reduced below the maximum allowable dose to ensure personal safety and achieve protection. The main point of shielding protection is to place a shielding material that can effectively absorb radiation between the radiation source and the human body. ^[3]