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

Abstract : The aim of this work is to study the impact of the inclusion of the recently measured β decay properties of the 102,104,105,106,107Tc, 105Mo, and 101Nb nuclei in the calculation of the antineutrino (anti-ν) energy spectra arising after the fissions of the four main fissile isotopes 235,238U, and 239,241Pu 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 239Pu 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 238U 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.
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Submitted on : Tuesday, June 1, 2021 - 10:58:56 AM
Last modification on : Thursday, August 5, 2021 - 1:08:04 PM

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Magali Estienne, Muriel Fallot, S. Cormon, A. Algora, van Minh Bui, et al.. Contribution of Recently Measured Nuclear Data to Reactor Antineutrino Energy Spectra Predictions. Nuclear Data Sheets, Elsevier, 2014, 120, pp.149-152. ⟨10.1016/j.nds.2014.07.031⟩. ⟨in2p3-01057793⟩



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