New determination of the 229Th half-life
Journal Article
·
· Journal of Radioanalytical and Nuclear Chemistry
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- Shine Medical Technologies, Janesville, WI (Untied States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Inst. for Radiological Protection and Nuclear Safety (IRSN), Fontenay-aux-Roses (France)
- Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France)
- K & E Innovations, Ewa Beach, HI (United States)
A new determination of the 229Th half-life was made based on measurements of the 229Th massic activity of a high-purity solution for which the 229Th molality had previously been measured. The 229Th massic activity was measured by direct comparison with SRM 4328C using 4παβ liquid scintillation counting, NaI counting, and standard addition liquid scintillation counting. The 229Th massic activity was confirmed by isotope dilution alpha spectrometry measurements. The 229Th half-life calculated from the activity measurements is (7825 ± 87) years (k = 2).
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1497940
- Alternate ID(s):
- OSTI ID: 22755121
- Report Number(s):
- LLNL-JRNL--756361; {942601,"Journal ID: ISSN 0236-5731"}
- Journal Information:
- Journal of Radioanalytical and Nuclear Chemistry, Journal Name: Journal of Radioanalytical and Nuclear Chemistry Journal Issue: 1 Vol. 318; ISSN 0236-5731
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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