Accès ouvert déclaré
2025
preprint
First results of the NEXT-100 detector using $^{83m}$Kr decays
NEXT Collaboration, G. Martínez-Lema, C. Hervés Carrete, S. Torelli, M. Cid Laso, P. Vázquez Cabaleiro, B. Palmeiro, J. A. Hernando Morata, J.J. Gómez-Cadenas, C. Adams, H. Almazán, V. Álvarez, A. I. Aranburu, L. Arazi, I. J. Arnquist, Fernando Auria‐Luna, S. Ayet, Y. Ayyad, C.D.R. Azevedo, K. Bailey, F. Ballester, Jose Eduardo Barcelon, M. del Barrio-Torregrosa, A. Bayo, J. M. Benlloch-Rodríguez, F.I.G.M. Borges, Alexey Brodoline, N. Byrnes, A. Castillo, E. Church, L. Cid, C.A.N. Conde, C. Cortes-Parra, Fernando P. Cossío, R. Coupe, E. Dey, Klaus Dietz, C. Echeverria, Mario Sanz Elorza, R. Felkai, L. M. P. Fernandes, P. Ferrario, F. W. Foss, Zoraida Freixa, J. García-Barrena, J. W. R. Grocott, R. Guenette, J. Hauptman, C. A. O. Henriques, P. Herrero-Gómez, V. Herrero, Y. Ifergan, Alberto Fernández Isabel, B. J. P. Jones, F. Kellerer, L. Larizgoitia, A. Larumbe, P. Lebrun, F. López, N. López-March, R. Madigan, R. D. P. Mano, Aimar Marauri, A. P. Marques, J. Martín-Albo, A. Martínez, M. Martínez-Vara, R. Miller, K. Mistry, J. Molina-Canteras, F. Monrabal, C. M. B. Monteiro, F. J. Mora, K. E. Navarro, P. Novella, D. R. Nygren, E. Oblak, J. Palacio, A. Para, I. Parmaksiz, A. Pazos, J. Pelegrìn, M. Pérez Maneiro, M. Querol, J. Renner, Iván Rivilla, C. Rogero, L. Rogers, B. Romeo, C. Romo-Luque, Elisa Ruiz-Chóliz, P. Saharia, F. P. Santos, J.M.F. dos Santos, M. Seemann, Itay Shomroni, A. L. M. Silva, P. A. O. C. Silva, A. Simón, S. R. Soleti, M. Sorel, J. Soto-Oton, J. M. R. Teixeira, S. Teruel-Pardo, J. F. Toledo, Claire Tonnelé, J. Torrent, Alexander Trettin, P. R. G. Valle, M. Vanga, J.F.C.A. Veloso, J. D. Villamil, J. Waiton, A. Yubero-Navarro
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Le résumé fourni par la source
The NEXT collaboration is investigating the double beta decay of $^{136}$Xe using high-pressure gas electroluminescent time projection chambers, which provide excellent energy resolution together with a robust topological signature. Operating at the Laboratorio Subterráneo de Canfranc (LSC) and building on the success of the NEXT-White detector, the NEXT-100 apparatus began commissioning in May 2024 and started operation with xenon at a pressure of 4 bar in October 2024. We report here the first results obtained with NEXT-100 using low-energy calibration data from $^{83m}$Kr decays, which allow mapping of the detector response in the active volume and monitoring of its stability over time. After homogenizing the light response, we achieve an energy resolution of 4.37% FWHM at 41.5 keV for $^{83m}$Kr point-like energy deposits contained in a radius of 425 mm. In a fiducial region representing the operating conditions of NEXT-100 at 10 bar we obtain an improved energy resolution of 4.16% FWHM. These results are in good agreement with that obtained in NEXT-White, and an $E^{-1/2}$ extrapolation to $Q_{ββ}$ yields an energy resolution close to 0.5% FWHM, well below the 1% FWHM design target.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Neutrino Physics ResearchAtomic and Subatomic Physics ResearchDark Matter and Cosmic Phenomena