Photo-fission Product Yield Measurements at E$_\gamma $=13 MeV on $^{235}$U, $^{238}$U, and $^{239}$Pu.

ORAL

Abstract

We have measured Fission Product Yields (FPYs) in photo-fission of $^{235}$U, $^{238}$U, and $^{239}$Pu at TUNL's High-Intensity Gamma-ray Source (HI$\gamma $S) using mono-energetic photons of E$_\gamma $=13 MeV. Details of the experimental setup and analysis procedures will be discussed. Yields for approximately 20 fission products were determined. They are compared to neutron-induced FPYs of the same actinides at the equivalent excitation energies of the compound nuclear systems. In the future photo-fission data will be taken at E$_\gamma $=8.0 and 10.5 MeV to find out whether photo-fission exhibits the same so far unexplained dependence of certain FPYs on the energy of the incident probe, as recently observed in neutron-induced fission, for example, for the important fission product $^{147}$Nd [1].\newline M. E. Gooden \textit{et al.}, Nucl. Data Sheets {\bf 131}, 319 (2016).

*Work supported by the U. S. Dept. of Energy, under Grant No. DE-FG02-97ER41033, and by the NNSA, Stewardship Science Academic Alliances Program, Grant No. DE-NA0001838 and the Lawrence Livermore, National Security, LLC under contract No. DE-AC52-07NA27344

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Authors

  • Wernew Tornow

    • Department of Physics and TUNL, Duke University, Durham, North Carolina 27708, USA
    • Duke University
    • Duke University/TUNL

  • Megha Bhike

    • Department of Physics and TUNL, Duke University, Durham, North Carolina 27708, USA
    • Duke University

  • Sean Finch

    • Department of Physics and TUNL, Duke University, Durham, North Carolina 27708, USA
    • Duke University
    • Duke University and TUNL

  • Fnu Krishichayan

    • Department of Physics and TUNL, Duke University, Durham, North Carolina 27708, USA
    • Duke University

  • Anton Tonchev

    • Lawrence Livermore National Laboratory, Livermore, California 94550, USA
    • Lawrence Livermore Natl Lab