Study of beta spectrum shapes relevant to the prediction of reactor antineutrino spectra

Abstract

The shapes of the beta spectra of 92Rb and 142Cs, two of the beta decays most relevant for the prediction of the antineutrino spectrum in reactors, have been measured. A new setup composed of two dE-E telescopes has been used. High purity radioactive beams of the isotopes of interest were provided by the IGISOL facility using the JYFLTRAP double Penning trap. The resulting beta spectra have been compared with model predictions using beta decay feedings from total absorption gamma spectroscopy measurements and shape corrections employed in the calculation of the antineutrino spectrum, validating both further. The procedure can be extended to other relevant nuclei in the future, providing solid ground for the prediction of the antineutrino spectrum in reactors.

11 pages, 6 figures

References in corpus (12)

• The Reactor Antineutrino Anomaly
• Improved measurements of the neutrino mixing angle ${\theta }_{13}$ with the Double Chooz detector
• Updated Summation Model: An Improved Agreement with the Daya Bay Antineutrino Fluxes
• Reevaluating reactor antineutrino spectra with new measurements of the ratio between ${}^{235}$U and ${}^{239}$Pu $\beta$ spectra
• Total Absorption Gamma-Ray Spectroscopy of 87Br, 88Br and 94Rb Beta-Delayed Neutron Emitters
• Beta-decay studies for applied and basic nuclear physics
• ${}^{113}$Cd $\beta$-decay spectrum and $g_{\mathrm{A}}$ quenching using spectral moments
• Cyclotron Radiation Emission Spectroscopy of Electrons from Tritium Beta Decay and ${}^{83\mathrm{m}}$Kr Internal Conversion
• Determination of Beta Decay Ground State Feeding of Nuclei of Importance for Reactor Applications
• First measurements with a new $\beta$-electron detector for spectral shape studies
• Measurement of the Spectral Shape of the beta-decay of 137Xe to the Ground State of 137Cs in EXO-200 and Comparison with Theory
• Simultaneous Measurement of Half-Life and Spectral Shape of ${}^{115}$In $\beta$-decay with an Indium Iodide Cryogenic Calorimeter

Cited by in corpus (1)

• Study of $\mathbf{\beta }$ Decay Shape Factors in First-Forbidden Transitions with $\mathbf{\Delta }{\mathbf{I}}^{\mathbf{\pi }}=0^{-}$ for Reactor Antineutrino Spectra Predictions