Updated uranium reference material 231Pa/235U consensus model ages for nuclear forensics
摘要
Radiochronometry provides the model age of nuclear materials, which is useful for understanding the production history of materials found outside of regulatory control. Certified reference materials (CRMs) are important for radiochronometry to increase confidence in measurement quality; however, the absence of 231Pa/235U CRMs necessitates that nuclear forensic laboratories measure the 231Pa/235U model ages of preexisting uranium reference materials. Here, new consensus 231Pa/235U model ages are reported from three nuclear forensic laboratories for three reference materials using current analytical methods. These updated consensus values can be used for quality control of 231Pa/235U model age measurements.