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Why Do We Need High-density Tungsten Alloy Shielding?

The development of medical technology has increased the use of radiation devices in daily life. The popularity of medical devices and nuclear energy has affected public health significantly. This has led to investigations into how to protect against radiation damage. Therefore, radiation such as X‐rays, gamma radiation (high‐energy electromagnetic radiation), alpha particles (helium nuclei), beta particles (electrons) and cosmic radiation must be shielded.

tungsten alloy shielding

The Reason to Block Radiation Sources

Researchers block radiation sources to protect patients, doctors, nurses and other hospital personnel. The radiation level of radioactive materials must be reduced to a point where no harmful ionising radiation is produced. This reduction helps to avoid lung cancer, skin cancer and other cancers.

Selection of Shielding Materials

Lead and Iron are traditional shielding materials. However, a high proportion of blocks made from a tungsten alloy is generally recommended. The choice of a high-density tungsten alloy is based on its excellent radiation absorption capacity, high density (approximately twice that of lead) and good corrosion resistance.

Advantages of High-Density Tungsten Alloy Shielding

The effectiveness of radiation shielding correlates with a material’s density. A higher density offers greater radiation absorption and blocking. Tungsten alloy has a density that is approximately twice that of lead; it absorbs gamma radiation efficiently and reduces the shield’s volume. In the same volume, high-density tungsten alloy provides enhanced shielding compared to lead.

tungsten alloy shielding

Researchers have found that tungsten alloy combines high density, ease of machining, good corrosion resistance, high radiation absorption (surpassing that of lead and steel) and high strength. Tests show that tungsten alloy shielding maintains the radiation blocking capability of lead even when the container volume and thickness are reduced. Furthermore, high-density tungsten alloy is more environmentally friendly than lead and depleted uranium given that it contains no toxic substances.

Application of High-Density Tungsten Alloy

High-density tungsten alloy shielding is not subject to particular restrictions under NRC, EPA and OSHA regulations. It is used widely in nuclear medicine as a collimator, a container for radioisotopes and a container for radiation sources.

Further reading: Application of Tungsten Alloy in Industrial Shielding

Conclusion

Thank you for reading this article. We trust it has helped to clarify the need for high-density tungsten alloy shielding. For further information on tungsten products, please visit Stanford Advanced Materials (SAM).

Stanford Advanced Materials (SAM) is a global supplier of tungsten. They have over 20 years of experience in the manufacture and sale of tungsten products. The company meets the research and production requirements of its clients. SAM is a reliable tungsten supplier and business partner.

About the author

Chin Trento

Chin Trento holds a bachelor's degree in applied chemistry from the University of Illinois. His educational background gives him a broad base from which to approach many topics. He has been working with writing advanced materials for over four years at Stanford Advanced Materials (SAM). His main purpose in writing these articles is to provide a free, yet quality resource for readers. He welcomes feedback on typos, errors, or differences in opinion that readers come across.

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