Abstract
The total prompt -ray energy distributions for the neutron-induced fission of and in the neutron energy range of 0.025 eV – 100 keV and the spontaneous fission of 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 4 -ray calorimeter. Corrections were made to the measured distribution by unfolding the two-dimension spectrum of total -ray energy vs multiplicity using a simulated DANCE response matrix generated with a geometrical model of the detector arrays and validated with the -ray calibration sources. The mean values of the total prompt -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 heating in nuclear reactors is discussed.
- Received 28 January 2014
- Revised 21 May 2014
DOI:https://doi.org/10.1103/PhysRevC.90.014602
©2014 American Physical Society