The radiochronometric model age is an important signature in nuclear forensic analysis. Recent studies have illustrated the need for controlled experiments on the behavior of decay products during uranium metal casting to provide a foundation for interpretation of discordant model ages. A variety of uranium metal and alloy samples cast under known conditions were analysed by three laboratories. This work is the first multi-laboratory study of its kind to explore how these progeny isotopes are chemically fractionated from uranium metal during casting. The intercomparison allowed for capability demonstration and method development on samples and provided data to increase our understanding of the behavior of decay progeny in these complex systems.

无线电计时模型年龄是核法医学分析中的一个重要特征。最近的研究表明，需要对铀金属铸造过程中衰变产物的行为进行受控实验，以便为解释不一致的模型年龄提供基础。三个实验室分析了在已知条件下铸造的各种铀金属和合金样品。这项工作是同类中第一个探索这些后代同位素在铸造过程中如何从铀金属中化学分馏的多实验室研究。比对允许对样品进行能力演示和方法开发，并提供数据以增加我们对这些复杂系统中衰变后代行为的理解。