Measurement of the 231Pa/235U ratio for the age determination of uranium materials
- Resource Type
- Authors
- Erich Hrnecek; Adrian Nicholl; Maria Wallenius; Klaus Mayer; Zsolt Varga
- Source
- Journal of Radioanalytical and Nuclear Chemistry
- Subject
- Materials science
Health, Toxicology and Mutagenesis
Nuclear forensics
chemistry.chemical_element
010403 inorganic & nuclear chemistry
Enriched uranium
Age determination
01 natural sciences
Article
Protactinium measurement
Analytical Chemistry
Radiology, Nuclear Medicine and imaging
Sample preparation
Spectroscopy
Nuclear safeguards
Isotopes of uranium
010401 analytical chemistry
Radiochemistry
Public Health, Environmental and Occupational Health
Secular equilibrium
Actinide
Uranium
Pollution
0104 chemical sciences
Nuclear Energy and Engineering
chemistry
Uranium-235
- Language
- ISSN
- 1588-2780
0236-5731
The paper describes the age (production date) determination of uranium reference materials using the 231Pa/235U ratio. Direct addition of 237Np in secular equilibrium with its 233Pa daughter was chosen instead of the regular milking of 237Np to avoid possible loss of Pa. Sample preparation consists of a fast, one-step procedure. The developed method using ICP-MS for the measurement of 231Pa is more precise than alpha spectrometry and is applicable for freshly produced low-enriched uranium materials. The measured ages are in good agreement with the reported production dates, thus the 231Pa/235U chronometer can be applied for validation of 230Th/234U in nuclear forensics and safeguards. Electronic supplementary material The online version of this article (10.1007/s10967-018-6247-9) contains supplementary material, which is available to authorized users.