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Article overview
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New antineutrino energy spectra predictions from the summation of beta decay branches of the fission products | | M. Fallot
; S. Cormon
; M. Estienne
; A. Algora
; V.M. Bui
; A. Cucoanes
; M. Elnimr
; L. Giot
; D. Jordan
; J. Martino
; A. Onillon
; A. Porta
; G. Pronost
; J. L. Taín
; F. Yermia
; A.-A. Zakari-Issoufou
; | | Date: |
19 Aug 2012 | | Abstract: | In this paper, we study the impact of the inclusion of the recently measured
beta decay properties of the $^{102;104;105;106;107}$Tc, $^{105}$Mo, and
$^{101}$Nb nuclei in an updated calculation of the antineutrino energy spectra
of the four fissible isotopes $^{235, 238}$U, and $^{239,241}$Pu. These
actinides are the main contributors to the fission processes in Pressurized
Water Reactors. The beta feeding probabilities of the above-mentioned Tc, Mo
and Nb isotopes have been found to play a major role in the $gamma$ component
of the decay heat of $^{239}$Pu, solving a large part of the $gamma$
discrepancy in the 4 to 3000,s range. They have been measured using the Total
Absorption Technique (TAS), avoiding the Pandemonium effect. The calculations
are performed using the information available nowadays in the nuclear
databases, summing all the contributions of the beta decay branches of the
fission products. Our results provide a new prediction of the antineutrino
energy spectra of $^{235}$U, $^{239,241}$Pu and in particular of $^{238}$U for
which no measurement has been published yet. We conclude that new TAS
measurements are mandatory to improve the reliability of the predicted spectra. | | Source: | arXiv, 1208.3877 | | Services: | Forum | Review | PDF | Favorites | |
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