Algora, A. et al, Agramunt, J., Tain, J. L., Garcia Cabrera, H., & Victoria, J. A. (2025). Study of the Beta Spectrum Shape of 92Rb and 142Cs Decays for the Prediction of Reactor Antineutrino Spectra. Phys. Rev. Lett., 135(14), 142502–10pp.
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 Delta E-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, corroborating 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.
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LUXE Collaboration(Abramowicz, H. et al), Almanza Soto, M., Blanch, C., Esperante, D., Fuster-Martinez, N., Garcia Cabrera, H., et al. (2024). Technical Design Report for the LUXE experiment. Eur. Phys. J.-Spec. Top., 233, 1709–1974.
Abstract: This Technical Design Report presents a detailed description of all aspects of the LUXE (Laser Und XFEL Experiment), an experiment that will combine the high-quality and high-energy electron beam of the European XFEL with a high-intensity laser, to explore the uncharted terrain of strong-field quantum electrodynamics characterised by both high energy and high intensity, reaching the Schwinger field and beyond. The further implications for the search of physics beyond the Standard Model are also discussed.
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