Tungsten Alloy Ionizing Radiation Shielding

In fact, there are many kinds of radiation in our life. But experts point out that the radiation which causes damage to the human body to the greatest extent is ionizing radiation. Ionizing radiation refers to a high-energy radiation with short wave length and high frequency, which can directly or indirectly ionize the atoms and molecules of matter by interacting with the matter. The ionizing ability of ionizing radiation depends on the energy carried by the rays, if the rays did not bring enough ionization energy, the ionization can not occur. With the development of radiation technology, the application of ionizing radiation in our life is increasingly widespread. In the nuclear industry, it is used in the mining, smelting and finishing of raw materials, as well as the production, use and research of nuclear reactors and fuel; in agriculture, it is used for cultivation of new varieties, the preservation of fruits and vegetables and food storage; in medicine, it is used in disease diagnosis, cancer therapy and radiography; in industry, it is used for ray generator, electronic speed welder and various accelerators.

When the body is exposed to ionizing radiation whose doses exceed a certain limit, ionizing radiation can cause harm to humans. Ionizing radiation can cause radiation sickness, and lead to the pathological changes in almost all the organs and systems, the most obvious is the blood-forming organs, nervous system and digestive system. Ionizing radiation damage can be divided into acute radiation injury, which caused by receiving a certain dose of radiation in a short time and commonly found in the nuclear accident and the patients treated by radiation therapy, and chronic radiation injury, which caused by receiving scattered dose of radiation in a long time (such as skin damage, hematopoietic disorders, leukopenia, impaired fertility, etc.). In addition, ionizing radiation can also cause cancer and fetal death and malformations. Therefore, the use of protective measures is necessary.

Protective measures include placing a shielding between human body and sources of ionizing radiation to weaken the strength of the ionizing radiation. Since tungsten alloy has the advantages of high density, good machinability, good corrosion resistance and high radiation absorption capacity, tungsten alloy is the best choice for radiation shielding. Reducing the volume and the thickness of tungsten alloy shielding, its shielding ability is still equivalent to lead shielding. In addition, tungsten alloy shielding is non-toxic non-polluting, so that it is easier for people to accept.

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