Ponente
Descripción
Predictions of the spectra of nuclear reactors’ electron antineutrinos do not coincide with the measurements [1]. These differences are known as the “Reactor Antineutrino Anomaly” and the spectral “bump” [2]. The e-shape collaboration looks for solutions for these problems via the improvement of relevant nuclear models used in the calculation of antineutrino spectra from reactors [3]. The collaboration uses the summation method [4] to calculate predictions of reactors’ antineutrino spectra due to its improved results over other methods, and electron $\Delta$E-E detectors to measure the beta spectra of relevant contributors to the antineutrino spectra [5]. Measurements of beta shapes were conducted at IGISOL-4 because the facility has a double Penning trap (JYFLTRAP) that produces isotopically clean radioactive beams of the isotopes of interest. This work presents the analysis of the Rb-92 beta spectrum measured at the facility during the I233 experiment.
[1] G. Mention, et al., Phys. Rev. D 83 (2011) pg. 073006.
[2] J. H. Choi, et al., Phys. Rev. Lett. 116 (2016) pg. 211801.
[3] A. Algora, et al., Eur. Phys. J. A 57 (2021) pg. 85.
[4] M. Estienne, et al., Phys. Rev. Lett. 123 (2019) pg. 022502.
[5] V. Guadilla, et al., arXiv preprint, arXiv:2305.13832 (2023).
