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What is Iodine 131?

Iodine 131 (131I), also loosely and nonspecifically called radioiodine, is an important radioisotope of iodine. It has a radioactive decay half-life of about eight days. Due to its mode of beta decay, iodine 131 is notable for causing mutation and death in cells that it penetrates, and other cells up to several millimeters away. For this reason, high doses of the isotope are sometimes less dangerous than low doses, since they tend to kill thyroid tissues that would otherwise become cancerous as a result of the radiation.

The Applications of Iodine 131 tungsten radiation shielding

Tungsten alloy has excellent radiation attenuation properties, allowing the thickness of shields to be reduced, while still effectively blocking harmful X-ray and gamma radiation. Tungsten alloy shielding is the best choice for Iodine 131 tungsten radiation shielding. Iodine 131 tungsten radiation shielding is associated with nuclear energy, medical diagnostic and treatment procedures, and natural gas production. It also plays a major role as a radioactive isotope present in nuclear fission products, and was a significant contributor to the health hazards from open-air atomic bomb.

Iodine 131 tungsten radiation shielding can be used in nuclear medicine therapeutically and in seen with diagnostic scanners. Due to use of the 131I as iodide salt exploits the mechanism of absorption of iodine by the normal cells of the thyroid gland, Iodine 131 tungsten radiation shielding also has been used in 131I treatment of thyrotoxicosis (hyperthyroidism) and some types of thyroid cancer that absorb iodine.

Why Use Iodine 131 tungsten radiation shielding?

The advantages of tungsten alloy:
High radiation attenuation; good shielding capability
Thinner and often lighter than equivalent lead shields
Easy to sterilise and keep clean
Non-toxic
Easily machined with conventional tools
Hard and durable – no need for coating

During design of shielding, tungsten alloy radiation shielding is calculated according to requirements of shield to abate the multiple shielding materials' thickness.
Formula: K=e^{0.693 d / △1/2}
K: Shield weakened multiple
△ 1/2: The tungsten alloy radiation shielding material of the half-value layer values

 

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