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Title: Effects of fission yield data in the calculation of antineutrino spectra for U 235 ( n , fission ) at thermal and fast neutron energies

Journal Article · · Physical Review Letters
 [1];  [1];  [1];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. International Atomic Energy Agency, Vienna (Austria)

Fission yields form an integral part of the prediction of antineutrino spectra generated by nuclear reactors, but little attention has been paid to the quality and reliability of the data used in current calculations. Following a critical review of the thermal and fast ENDF/B-VII.1 235U fission yields, deficiencies are identified and improved yields are obtained, based on corrections of erroneous yields, consistency between decay and fission yield data, and updated isomeric ratios. These corrected yields are used to calculate antineutrino spectra using the summation method. An anomalous value for the thermal fission yield of 86Ge generates an excess of antineutrinos at 5–7 MeV, a feature which is no longer present when the corrected yields are used. Thermal spectra calculated with two distinct fission yield libraries (corrected ENDF/B and JEFF) differ by up to 6% in the 0–7 MeV energy window, allowing for a basic estimate of the uncertainty involved in the fission yield component of summation calculations. Lastly, the fast neutron antineutrino spectrum is calculated, which at the moment can only be obtained with the summation method and may be relevant for short baseline reactor experiments using highly enriched uranium fuel.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC00112704; AC02-98CH10886
OSTI ID:
1337617
Alternate ID(s):
OSTI ID: 1245040
Report Number(s):
BNL-108548-2016-JA; PRLTAO; R&D Project: EST-003-NEFA; KB0301041
Journal Information:
Physical Review Letters, Vol. 116, Issue 13; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 43 works
Citation information provided by
Web of Science

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Cited By (9)

Identifying Inconsistencies in Fission Product Yield Evaluations with Prompt Neutron Emission journal March 2018
Review on the progress in nuclear fission—experimental methods and theoretical descriptions journal September 2018
Physics with reactor neutrinos journal February 2019
Isomeric fission yield ratios for odd-mass Cd and In isotopes using the phase-imaging ion-cyclotron-resonance technique journal January 2019
The Soreq Applied Research Accelerator Facility (SARAF): Overview, research programs and future plans journal May 2018
Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay text January 2017
Physics with Reactor Neutrinos text January 2018
Impact of Fission Neutron Energies on Reactor Antineutrino Spectra text January 2018
Fuel-composition dependent reactor antineutrino yield at RENO text January 2018

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