239Pu Fission Spectrum Cumulative Fission Product Yield Measurement Using Godiva IV Critical Assembly

Tamashiro, A. S.; Harke, J. T.; Duarte, J. G.; Mishnayot, Y.; Padgett, S. W.; Slavik, G.; Burcher, S.; Harward, N.; Gharibyan, N.; Henderson, R. A.; Greenwood, L. R.; Pierson, B. D.; Goda, J. M.; Bounds, J. A.; Hayes, D. K.; Palmer, C. J.

doi:10.1016/j.nds.2024.01.007

²³⁹Pu Fission Spectrum Cumulative Fission Product Yield Measurement Using Godiva IV Critical Assembly

Journal Article · Tue Feb 06 00:00:00 EST 2024 · Nuclear Data Sheets

DOI:https://doi.org/10.1016/j.nds.2024.01.007· OSTI ID:2429667

Tamashiro, A. S. ^[1]; Harke, J. T. ^[2]; Duarte, J. G. ^[2]; Mishnayot, Y. ^[2]; Padgett, S. W. ^[2]; Slavik, G. ^[2]; Burcher, S. ^[2]; Harward, N. ^[2]; Gharibyan, N. ^[2]; Henderson, R. A. ^[2]; ^[3]; Pierson, B. D. ^[3]; Goda, J. M. ^[4]; Bounds, J. A. ^[4]; Hayes, D. K. ^[4]; Palmer, C. J. ^[1]

Oregon State Univ., Corvallis, OR (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Precise integral measurement of fast neutron-induced fission product yields for various actinides is of high interest for applied nuclear science. The goal of this effort is to improve uncertainties in fission product yield values of ²³⁹Pu. Fission was induced in a pure ²³⁹Pu (>99%) target using the Godiva IV critical assembly in burst mode. Further, the irradiated sample was transferred to a high-resolution γ-ray detector within 45 minutes. γ-ray list mode data was collected from 45 minutes to 1 week after the irradiation. γ-ray spectroscopy was performed to analyze the time dependent γ-ray yields using an automated peak search algorithm to identify isotopes by their decay γ-ray energy and half-life. The initial activity for each isotope identified was used to calculate their fission product yield.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Sponsoring Organization:: USDOE; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC05-76RL01830; AC52-07NA27344

OSTI ID:: 2429667

Alternate ID(s):: OSTI ID: 2439222

Report Number(s):: LLNL--JRNL-868054; PNNL-SA--195253; 1097705

Journal Information:: Nuclear Data Sheets, Journal Name: Nuclear Data Sheets Vol. 193; ISSN 0090-3752

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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