Total absorption spectroscopy study of the β decay of 86Br and 91Rb

S. Rice, A. Algora*, J.L. Tain, E. Valencia, J. Agramunt, B. Rubio, W. Gelletly, P.H. Regan, A.A. Zakari-Issoufou, M. Fallot, A. Porta, J. Rissanen, T. Eronen, J. Äystö, L. Batist, M. Bowry, V.M. Bui, R. Caballero-Folch, D. Cano-Ott, V.V. ElomaaE. Estevez, G.F. Farrelly, A.R. Garcia, B. Gomez-Hornillos, V. Gorlychev, J. Hakala, M.D. Jordan, A. Jokinen, V.S. Kolhinen, F.G. Kondev, T. Martínez, P. Mason, E. Mendoza, I. Moore, H. Penttilä, Zs. Podolyák, M. Reponen, V. Sonnenschein, A.A. Sonzogni, P. Sarriguren

*Corresponding author for this work

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21 Citations (Scopus)

Abstract

The beta decays of 86Br and 91Rb have been studied using the total absorption spectroscopy technique. The radioactive nuclei were produced at the Ion Guide Isotope Separator On-Line facility in Jyväskylä and further purified using the JYFLTRAP. 86Br and 91Rb are considered to be major contributors to the decay heat in reactors. In addition, 91Rb was used as a normalization point in direct measurements of mean gamma energies released in the beta decay of fission products by Rudstam et al. assuming that this decay was well known from high-resolution measurements. Our results show that both decays were suffering from the Pandemonium effect and that the results of Rudstam et al. should be renormalized. The relative impact of the studied decays in the prediction of the decay heat and antineutrino spectrum from reactors has been evaluated.
Original languageEnglish
Article number014320
Number of pages10
JournalPhysical Review C
Volume96
Issue number1
DOIs
Publication statusPublished - 27 Jul 2017
Externally publishedYes

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