Energy calibration of the NEXT-White detector with 1% resolution near Q$\beta\beta$ of $^{136}$Xe

NEXT Collaboration,Renner J., López G. Díaz,Ferrario P.,Morata J. A. Hernando,Kekic M., Martínez-Lema G.,Monrabal F.,Gómez-Cadenas J. J.,Adams C.,Álvarez V.,Arazi L., Arnquist I. J.,Azevedo C. D. R,Bailey K.,Ballester F., Benlloch-Rodríguez J. M.,Borges F. I. G. M., Byrnes N., Cárcel S., Carrión J. V.,Cebrián S., Church E., Conde C. A. N.,Díaz J., Diesburg M.,Escada J., Esteve R., Felkai R., Fernandes A. F. M.,Fernandes L. M. P.,Ferreira A. L.,Freitas E. D. C., Generowicz J.,Ghosh S., Goldschmidt A., González-Díaz D., Guenette R.,Gutiérrez R. M.,Haefner J.,Hafidi K., Hauptman J.,Henriques C. A. O.,Herrero P.,Herrero V., Ifergan Y., Johnston S.,Jones B. J. P., Labarga L., Laing A., Lebrun P.,López-March N.,Losada M., Mano R. D. P.,Martín-Albo J.,Martínez A., McDonald A. D.,Monteiro C. M. B.,Mora F. J.,Vidal J. Muñoz,Novella P., Nygren D. R.,Palmeiro B., Para A.,Pérez J.,Psihas F., Querol M.,Repond J., Riordan S.,Ripoll L., García Y. Rodríguez,Rodríguez J., Rogers L., Romeo B., Romo-Luque C., Santos F. P.,Santos J. M. F. dos,Simón A., Sofka C.,Sorel M., Stiegler T.,Toledo J. F., Torrent J., Usón A.,Veloso J. F. C. A., Webb R., Weiss-Babai R., White J. T., Woodruff K.,Yahlali N.

arxiv（2019）

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摘要

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 ($\beta\beta0\nu$) 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 than 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 $\beta\beta0\nu$ searches.

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