Energy calibration of the NEXT-White detector with 1% resolution near Q$_{ββ}$ of $^{136}$Xe
physics.ins-det
/ Authors
J. Renner, G. Díaz López, P. Ferrario, J. A. Hernando Morata, M. Kekic, G. Martínez-Lema, F. Monrabal, J. J. Gómez-Cadenas, C. Adams, V. Álvarez
and 80 more authors
L. Arazi, I. J. Arnquist, C. D. R Azevedo, K. Bailey, F. Ballester, J. M. Benlloch-Rodríguez, F. I. G. M. Borges, N. Byrnes, S. Cárcel, J. V. Carrión, S. Cebrián, E. Church, C. A. N. Conde, T. Contreras, J. Díaz, M. Diesburg, J. Escada, R. Esteve, R. Felkai, A. F. M. Fernandes, L. M. P. Fernandes, A. L. Ferreira, E. D. C. Freitas
/ Abstract
Excellent energy resolution is one of the primary advantages of electroluminescent high pressure xenon TPCs, and searches for rare physics events such as neutrinoless double-beta decay ($β\beta0ν$) require precise energy measurements. Using the NEXT-White detector, developed by the NEXT (Neutrino Experiment with a Xenon TPC) collaboration, we show for the first time that an energy resolution of 1% FWHM can be achieved at 2.6 MeV, establishing the present technology as the one with the best energy resolution of all xenon detectors for $β\beta0ν$ searches.