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Title: Contribution of Recently Measured Nuclear Data to Reactor Antineutrino Energy Spectra Predictions

The aim of this work is to study the impact of the inclusion of the recently measured β decay properties of the {sup 102,104,105,106,107}Tc, {sup 105}Mo, and {sup 101}Nb nuclei in the calculation of the antineutrino (anti-ν) energy spectra arising after the fissions of the four main fissile isotopes {sup 235,238}U, and {sup 239,241}Pu in PWRs. These β feeding probabilities, measured using the Total Absorption Technique (TAS) at the JYFL facility of Jyväskylä, have been found to play a major role in the γ component of the decay heat for {sup 239}Pu in the 4-3000 s range. Following the fission product summation method, the calculation was performed using the MCNP Utility Reactor Evolution code (MURE) coupled to the experimental spectra built from β decay properties of the fission products taken from evaluated databases. These latest TAS data are found to have a significant effect on the Pu isotope energy spectra and on the spectrum of {sup 238}U showing the importance of their measurement for a better assessment of the reactor anti-ν energy spectrum, as well as importance for fundamental neutrino physics experiments and neutrino applied physics.
Authors:
 [1] ; ;  [1] ;  [2] ;  [3] ; ; ; ;  [1] ;  [2] ; ; ; ; ;  [1] ;  [2] ; ;  [1]
  1. SUBATECH, CNRS/IN2P3, Université de Nantes, Ecole des Mines de Nantes, F-44307 Nantes (France)
  2. IFIC (CSIC-Univ. Valencia), Valencia (Spain)
  3. (Hungary)
Publication Date:
OSTI Identifier:
22436708
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Data Sheets; Journal Volume: 120; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; AFTER-HEAT; BETA DECAY; ELECTRON ANTINEUTRINOS; ENERGY SPECTRA; FISSION PRODUCTS; MOLYBDENUM 105; NIOBIUM 101; PLUTONIUM 239; PLUTONIUM 241; PWR TYPE REACTORS; TECHNETIUM ISOTOPES; URANIUM 235; URANIUM 238