Total absorption spectroscopy study of $^{92}$Rb decay: a major contributor to reactor antineutrino flux

Abstract : The antineutrino spectra measured in recent experiments at reactors are inconsistent with calculations based on the conversion of integral beta spectra recorded at the ILL reactor. $^{92}$Rb makes the dominant contribution to the reactor spectrum in the 5-8 MeV range but its decay properties are in question. We have studied $^{92}$Rb decay with total absorption spectroscopy. Previously unobserved beta feeding was seen in the 4.5-5.5 region and the GS to GS feeding was found to be 87.5(25)%. The impact on the reactor antineutrino spectra calculated with the summation method is shown and discussed.
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Physical Review Letters, American Physical Society, 2015, 110 (10), pp.102503. 〈10.1103/PhysRevLett.115.102503〉
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Contributeur : Sylvie Flores <>
Soumis le : mardi 16 juin 2015 - 07:52:53
Dernière modification le : jeudi 5 avril 2018 - 10:36:16

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A. -A. Zakari-Issoufou, M. Fallot, A. Porta, A. Algora, J. L. Tain, et al.. Total absorption spectroscopy study of $^{92}$Rb decay: a major contributor to reactor antineutrino flux. Physical Review Letters, American Physical Society, 2015, 110 (10), pp.102503. 〈10.1103/PhysRevLett.115.102503〉. 〈in2p3-01163990〉

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