Here are some brief introductions of the three common used radioisotope elements:

 

1, Iodine-131

 

Iodine-131 is a radioisotope of iodine element, which is a product of nuclear fission, and it is also an artificially created radioisotope. It is a β decayed nuclide, mainly emitted 99% of the β rays and 1% of the γ-rays, and mainly used in nuclear medicine for treating thyroid disease and thyroid function examination. As for the existence of its radiation, we can use the tungsten alloy with a certain thickness to shield it in the treatment process.

 

2, Cesium-137

 

Cesium-137 is a new element,which was produced after the first atomic bomb explosion in 1945, in another words, Ce-137 was one of the derivatives that generated by the nuclear bomb, nuclear weapons test and nuclear reactor fission. Ce-137 releases the γ rays, it is a high-radiation sources, which could greatly harm the human beings health with the increasing of its radiation intensity and radiation dose, and even lead to death. Since tungsten alloy has a very good shielding function on γ-ray , therefore the application effects of the cesium-137 shielding are very significant.

 

3, Cobalt-60

 

Cobalt-60 is one of the radioisotopes of cobalt metal element, which belongs to highly toxic radionuclides. It can release 315KeV high-speed electrons through β decay and become Nickel-60, while releasing two beams of γ rays, its half-life period is 5.272 years. Cobalt-60 is often applied in the form of radioactive sources by people, so the way to shield cobalt-60 is to shield its radiation source. Sealing the cobalt-60 in tungsten alloy shielding containers(As shown in the pic.) can achieve the purposes of radiation shielding.