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What is Cobalt 60?

Cobalt 60 (Co 60) is a synthetic radioactive isotope of cobalt with a half-life of 5.2714 years. It can emit 315KeV high speed electronic and two beams of gamma rays through beta decay. It is produced artificially in nuclear reactors. Deliberate industrial production depends on neutron activation of bulk samples of the monoisotopic and mononuclidic cobalt isotope Co 59. Measurable quantities are also produced as a by-product of typical nuclear power plant operation and may be detected externally when leaks occur.

The Applications of Cobalt 60 Tungsten Radiation Shielding

Due to its high density and excellent absorption behaviour against radiation, tungsten alloy can be widely used in cobalt 60 tungsten radiation shielding to protect the damage from Co 60 radiation.

The main uses for cobalt 60 tungsten radiation shielding are: tracer for cobalt in chemical reactions, Sterilization of medical equipment, medical radiotherapy, industrial radiography, leveling devices and thickness gauges, pest insect sterilization, food irradiation and blood irradiation,and laboratory mutagenesis.

Why Use Cobalt 60 Tungsten Radiation Shielding?

Compared to traditional radiation shielding materials such as lead and boron carbide, tungsten alloy radiation shielding provide excellent density with small capacity. At the same weights high density alloy can provide the same energy absorption as lead using 1/3 less material.

When the weight is certain, more density, more denser, and the thickness would be thinner. Tungsten alloy material could be made with thinner thickness but high absorption of radiation in high density. That is why tungsten alloy material is suitable for radiation shielding.Cobalt 60 tungsten radiation shielding is better than lead materials for it is non-toxic.

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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