US EPA

3729177 

Journal Article 

Total prompt gamma-ray emission in fission of U-235, Pu-239,Pu-241, and Cf-252 

Chyzh, A; Wu, CY; Kwan, E; Henderson, RA; Bredeweg, TA; Haight, RC; Hayes-Sterbenz, AC; Lee, HY; O'Donnell, JM; Ullmann, JL 

2014 

1 

Physical Review C (Nuclear Physics)
ISSN: 0556-2813
EISSN: 1089-490X 

90 

1 

10.1103/PhysRevC.90.014602 

WOS:000343002300004 

The total prompt gamma-ray energy distributions for the neutron-induced fission of U-235 and Pu-239,Pu-241 in the neutron energy range of 0.025 eV - 100 keV and the spontaneous fission of Cf-252 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 pi gamma-ray calorimeter. Corrections were made to the measured distribution by unfolding the two-dimension spectrum of total gamma-ray energy vs multiplicity using a simulated DANCE response matrix generated with a geometrical model of the detector arrays and validated with the gamma-ray calibration sources. The mean values of the total prompt gamma-ray energy, determined from the unfolded distributions, are similar to 20% higher than those of early measurements for all the fissile nuclei studied. The implication for the gamma heating in nuclear reactors is discussed.