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, A. Remoto, J. L. Taín, F. Yermia, A. A. Zakari-Issoufou

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

In this Letter, we study the impact of the inclusion of the recently measured beta decay properties of the Tc102;104;105;106;107, Mo105, and Nb101 nuclei in an updated calculation of the antineutrino energy spectra of the four fissible isotopes U235,238 and Pu239,241. 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 γ component of the decay heat of Pu239, solving a large part of the γ discrepancy in the 4-3000s range. They have been measured by using the total absorption technique, insensitive to the pandemonium effect. The calculations are performed by 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 U235, Pu239,241, and, in particular, U238 for which no measurement has been published yet. We conclude that new total absorption technique measurements are mandatory to improve the reliability of the predicted spectra.

Original languageEnglish
Article number202504
JournalPhysical review letters
Volume109
Issue number20
DOIs
Publication statusPublished - Nov 13 2012

    Fingerprint

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Fallot, M., Cormon, S., Estienne, M., Algora, A., Bui, V. M., Cucoanes, A., Elnimr, M., Giot, L., Jordan, D., Martino, J., Onillon, A., Porta, A., Pronost, G., Remoto, A., Taín, J. L., Yermia, F., & Zakari-Issoufou, A. A. (2012). New antineutrino energy spectra predictions from the summation of beta decay branches of the fission products. Physical review letters, 109(20), [202504]. https://doi.org/10.1103/PhysRevLett.109.202504