Total prompt γ-ray emission in fission
1 Lawrence Livermore National Laboratory, Livermore, California 94550 USA
2 North Carolina State University, Raleigh, North Carolina 27695 USA
3 National Superconducting Cyclotron Laboratory, East Lansing, Michigan 48824 USA
4 Los Alamos National Laboratory, Los Alamos, New Mexico 87545 USA
a Corresponding author: email@example.com
Published online: 21 June 2016
The total prompt γ-ray energy distributions for the neutron-induced fission of 235U, 239,241Pu at incident neutron energy of 0.025 eV ‒ 100 keV, and the spontaneous fission of 252Cf were measured using the Detector for Advanced Neutron Capture Experiments (DANCE) array 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. The mean values of the total prompt γ-ray energy, determined from the unfolded distributions, are ~ 20% higher than those derived from measurements using single γ-ray detector for all the fissile nuclei studied. This raises serious concern on the validity of the mean total prompt γ-ray energy obtained from the product of mean values for both prompt γ-ray energy and multiplicity.
© The Authors, published by EDP Sciences, 2016
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