Tungsten alloy radiation shield is more suitable for shielding X-rays and neutrons generated from the electron linear accelerator than lead radiation shield as tungsten alloy has high density of 16.5-18.75 g/cm3, which is 50% higher than lead. Also, tungsten alloy also has a strong ability to absorb rays, which is 30-40% higher than lead. In addition, tungsten alloy has environmental protection characteristics.
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Tungsten alloy radiation shield of medical electron linear accelerator is shielding primary X-rays (useful ray beams), leaked X-rays, scattered X-rays, leaked neutrons, etc. When the electron beam of the accelerator is used for radiation therapy, all incident electrons are absorbed by human tissues. The human body also generates bremsstrahlung when it absorbs electrons. However, if the radiation shield can attenuate the X-rays generated by the accelerator to meet the requirements of radiation protection, it has already far exceeded the shielding protection requirements required for attenuating the bremsstrahlung radiation generated by the human body, so it is mainly for shielding X-rays and neutrons. Studies have shown that environmentally friendly tungsten alloy radiation shield is the most suitable radiation protective materials for linear accelerators.
