New determination of the 229Th half-life

doi:10.1007/s10967-018-6032-9

Title: New determination of the ²²⁹Th half-life

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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]; Mann, Jacqueline L. ^[1]; Collé, Ronald ^[1]; Laureano-Perez, Lizbeth ^[1]; Bennett, Megan E. ^[2]; Dion, Heather ^[3]; Fitzgerald, Ryan ^[1]; Gaffney, Amy M. ^[4]; Gourgiotis, Alkiviadis ^[5]; Hubert, Amélie ^[6]; Inn, Kenneth G. W. ^[7]; Kinman, William S. ^[3]; Lamont, Stephen P. ^[3]; Steiner, Robert ^[3]; Williams, Ross W. ^[4]

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:: 2018-07-24

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.

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                    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.  doi:10.1007/s10967-018-6032-9.

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                    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.  doi:10.1007/s10967-018-6032-9.  https://www.osti.gov/servlets/purl/1497940.

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@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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Title: New determination of the 229Th half-life

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Title: New determination of the ²²⁹Th half-life