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The tungsten alloy SAM is used for shielding against X‑rays and gamma radiation. The density of SAM tungsten shielding exceeds that of lead by more than 60%. This higher density permits a reduction in the physical dimensions of shielding components without affecting stiffness or shielding performance.
Tungsten is classified as one of the hardest substances identified in nature. It has a high density and undergoes minimal softening. Natural tungsten is a silvery‐white metal. It can become combustible when processed into a high‐grade powder, thereby igniting spontaneously. Plant tungsten contains five stable isotopes and twenty‐one different unstable isotopes.
Tungsten is employed in several techniques given its durability and resistance. It is resistant to corrosion. Its melting point is approximately 3 422 °C. It also possesses the highest tensile strength among commonly used metals. Its energy is released during compound formation; natural tungsten may exhibit reduced hardness under certain conditions.
SAM tungsten shields are utilised in applications such as collimators, nuclear shielding, radiation stops, PET syringe shields, vial shields, isotope containers, FDG containers and multi‐leaf collimators in the following sectors:
Nuclear medicine
Industrial shielding applications
Nuclear engineering
Nuclear research
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