Erratum: Monoenergetic photon-induced fission cross-section ratio measurements for ${}^{235}\mathrm{U}$ , ${}^{238}\mathrm{U}$ , and ${}^{239}\mathrm{Pu}$ from 9.0 to 17.0 MeV

Journal Article · Fri Mar 31 00:00:00 EDT 2023 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.107.039906· OSTI ID:1973188

Finch, S. W.  ^[1]; Krishichayan, . ^[1]; Howell, C. R. ^[1]; Tonchev, A. P. ^[2]; Tornow, W. ^[1]; Gooden, M. E. ^[3]; Malone, R. C. ^[2]; Silano, J. A. ^[2]; Ramirez, A. D. ^[2]

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1. Triangle Universities Nuclear Laboratory, Durham, NC (United States); Duke University, Durham, NC (United States)
2. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
3. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

In this erratum we report a correction to the previously published photofission cross-section ratio data. The actinide fission-chamber foils utilized in this work were extensively characterized during a new campaign using α- and γ-ray spectroscopy, and 2π alpha counting. These three techniques agreed, resulting in an improved accuracy of the fission-chamber foil masses used in the original experiment. The foil masses measured by α spectroscopy are detailed in Table I. All foils were counted on the same α spectrometer, using an identical geometry, which reduces the systematic uncertainty in the calculated mass ratios since the α spectrometer efficiency cancels out in the ratio. This results in a relative uncertainty on the mass ratio of 1.0% for ²³⁵U/₂₃₈U, 0.62% for ²³⁹Pu/²³⁵U, and 1.1% for ²³⁹Pu/²³⁸U. The published cross-section ratio data are re-calculated to reflect the updated target masses and uncertainties. The new mass values cause a 2.40% decrease for the σ(²³⁵U(γ, f)/²³⁸U(γ, f)) ratio, a 5.10% decrease for the σ(²³⁵U(γ, f)/²³⁹Pu(γ, f)) ratio, and a 2.77% decrease for the σ(²³⁸U(γ, f)/²³⁹Pu(γ, f)) ratio. The updated cross-section ratios are presented in Tables II, III, and IV, which are corrected versions of Tables III, IV, and V in Ref. [1]

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: AC52-07NA27344; NA0004067
• OSTI ID: 1973188
• Alternate ID(s): OSTI ID: 1969886
• Report Number(s): LLNL-JRNL-844095; 1067157; TRN: US2313869
• Journal Information: Physical Review. C, Vol. 107, Issue 3; ISSN 2469-9985
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS