New determination of the 229Th half-life
Abstract
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).
- Authors:
-
[1];
- 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)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1497940
- Report Number(s):
- LLNL-JRNL-756361
Journal ID: ISSN 0236-5731; 942601
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Radioanalytical and Nuclear Chemistry
- Additional Journal Information:
- Journal Volume: 318; Journal Issue: 1; Journal ID: ISSN 0236-5731
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Essex, Richard M., Mann, Jacqueline L., Collé, Ronald, Laureano-Perez, Lizbeth, Bennett, Megan E., Dion, Heather, Fitzgerald, Ryan, Gaffney, Amy M., Gourgiotis, Alkiviadis, Hubert, Amélie, Inn, Kenneth G. W., Kinman, William S., Lamont, Stephen P., Steiner, Robert, and Williams, Ross W. New determination of the 229Th half-life. United States: N. p., 2018.
Web. doi:10.1007/s10967-018-6032-9.
Essex, Richard M., Mann, Jacqueline L., Collé, Ronald, Laureano-Perez, Lizbeth, Bennett, Megan E., Dion, Heather, Fitzgerald, Ryan, Gaffney, Amy M., Gourgiotis, Alkiviadis, Hubert, Amélie, Inn, Kenneth G. W., Kinman, William S., Lamont, Stephen P., Steiner, Robert, & Williams, Ross W. New determination of the 229Th half-life. United States. https://doi.org/10.1007/s10967-018-6032-9
Essex, Richard M., Mann, Jacqueline L., Collé, Ronald, Laureano-Perez, Lizbeth, Bennett, Megan E., Dion, Heather, Fitzgerald, Ryan, Gaffney, Amy M., Gourgiotis, Alkiviadis, Hubert, Amélie, Inn, Kenneth G. W., Kinman, William S., Lamont, Stephen P., Steiner, Robert, and Williams, Ross W. Tue .
"New determination of the 229Th half-life". United States. https://doi.org/10.1007/s10967-018-6032-9. https://www.osti.gov/servlets/purl/1497940.
@article{osti_1497940,
title = {New determination of the 229Th half-life},
author = {Essex, Richard M. and Mann, Jacqueline L. and Collé, Ronald and Laureano-Perez, Lizbeth and Bennett, Megan E. and Dion, Heather and Fitzgerald, Ryan and Gaffney, Amy M. and Gourgiotis, Alkiviadis and Hubert, Amélie and Inn, Kenneth G. W. and Kinman, William S. and Lamont, Stephen P. and Steiner, Robert and Williams, Ross W.},
abstractNote = {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).},
doi = {10.1007/s10967-018-6032-9},
journal = {Journal of Radioanalytical and Nuclear Chemistry},
number = 1,
volume = 318,
place = {United States},
year = {2018},
month = {7}
}
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Fig 1: Simplified decay scheme for 229Th. The uncertainties for the half-lives are standard uncertainties. Half-life and decay mode data for 229Th are from [12]. Half-life and decay mode 60 data for all other isotopes are from [13].
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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.