Total prompt γ-ray emission in fission of U235, Pu239,241, and Cf252

A. Chyzh, C. Y. Wu, E. Kwan, R. A. Henderson, T. A. Bredeweg, R. C. Haight, A. C. Hayes-Sterbenz, H. Y. Lee, J. M. O'Donnell, and J. L. Ullmann
Phys. Rev. C 90, 014602 – Published 11 July 2014

Abstract

The total prompt γ-ray energy distributions for the neutron-induced fission of U235 and Pu239,241 in the neutron energy range of 0.025 eV – 100 keV and the spontaneous fission of Cf252 were measured using the Detector for Advanced Neutron Capture Experiments (DANCE) in coincidence with the detection of fission fragments by a parallel-plate avalanche counter. DANCE is a highly segmented, highly efficient 4π γ-ray calorimeter. Corrections were made to the measured distribution by unfolding the two-dimension spectrum of total γ-ray energy vs multiplicity using a simulated DANCE response matrix generated with a geometrical model of the detector arrays and validated with the γ-ray calibration sources. The mean values of the total prompt γ-ray energy, determined from the unfolded distributions, are 20% higher than those of early measurements for all the fissile nuclei studied. The implication for the γ heating in nuclear reactors is discussed.

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  • Received 28 January 2014
  • Revised 21 May 2014

DOI:https://doi.org/10.1103/PhysRevC.90.014602

©2014 American Physical Society

Authors & Affiliations

A. Chyzh1, C. Y. Wu1, E. Kwan1,3, R. A. Henderson1, T. A. Bredeweg2, R. C. Haight2, A. C. Hayes-Sterbenz2, H. Y. Lee2, J. M. O'Donnell2, and J. L. Ullmann2

  • 1Lawrence Livermore National Laboratory, Livermore, California 94550, USA
  • 2Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 3National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824, USA

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Vol. 90, Iss. 1 — July 2014

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