无论在发达国家还是在发展中国家,密封放射源都被广泛用于农业、工业、医学和各研究领域。世界上的密封放射源估计达数百万个,尽管在册源的数量比这要少得多。密封源是一种(a)永久密封在容器中或(b)紧密束缚在固态基质内的放射性物质。密封源的容器或基质材料应很牢固,足以在正常使 Sealed radioactive sources are widely used in agriculture, industry, medicine and research fields, both in developed and developing countries. There are millions of sealed radioactive sources estimated in the world, although the number of sources in circulation is much lower than this. The source of sealing is one which (a) is permanently sealed in a container or (b) is tightly bound within a solid matrix. The sealed source container or matrix material should be strong enough for normal use