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- Title
Primary standardization of the massic activity of a <sup>233</sup>Pa solution.
- Authors
Fitzgerald, R.; Pibida, L.
- Abstract
Protactinium-233 (233Pa) is used as a tracer for radiochemical analysis and is of particular interest as an isotope dilution mass spectrometry (IDMS) spike for 231Pa/235U radio-chronometry. To this end, we present massic activity determinations by two methods for a 233Pa solution, which was prepared at Lawrence Livermore National Laboratory (LLNL) and is being characterized at multiple labs as part of a 231Pa reference material production project. One activity determination method was 4πβ-γ anti-coincidence counting in a multi-dimensional extrapolation model, with Monte Carlo corrections. An independent massic activity determination was completed by γ<inline-graphic></inline-graphic>-ray spectrometry using 5 high purity germanium (HPGe) detectors using 5 γ<inline-graphic></inline-graphic>-ray lines. The anti-coincidence and γ<inline-graphic></inline-graphic>-ray spectrometry results agree and have combined standard uncertainties of about 0.33% and 1.0% respectively. In addition, the two methods were combined to derive γ<inline-graphic></inline-graphic>-ray emission probabilities from 233Pa decay.
- Subjects
RADIOCHEMICAL analysis; PROTACTINIUM; RADIOISOTOPES; GAMMA ray spectrometry; NUCLEAR chemistry
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2018, Vol 318, Issue 1, p149
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-018-6113-9