Measurement of radon-induced backgrounds in the NEXT double beta decay experiment

Novella, P. ; Palmeiro, B. ; Simón, A. ; Sorel, M. ; Adams, C. ; Ferrario, P. ; Martínez-Lema, G. ; Monrabal, F. ; Zuzel, G. ; Gómez-Cadenas, J.J. ; Álvarez, V. ; Arazi, L. ; Azevedo, C.D.R. ; Bailey, K. ; Ballester, F. ; Benlloch-Rodríguez, J.M. ; Borges, F.I.G.M. ; Botas, A. ; Cárcel, S. ; Carrión, J.V. ; Cebrián, S. (Universidad de Zaragoza) ; 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. ; Goldschmidt, A. ; González-Díaz, D. ; Guenette, R. ; Gutiérrez, R.M. ; Hafidi, K. ; Hauptman, J. ; Henriques, C.A.O. ; Hernandez, A.I. ; Hernando Morata, J.A. ; Herrero, V. ; Johnston, S. ; Jones, B.J.P. ; Kekic, M. ; Labarga, L. ; Laing, A. ; Lebrun, P. ; López-March, N. ; Losada, M. ; Mano, R.D.P. ; Martíin-Albo, J. ; Martínez, A. ; McDonald, A. ; Monteiro, C.M.B. ; Mora, F.J. ; Muñoz Vidal, J. ; Musti, M. ; Nebot-Guinot, M. ; Nygren, D.R. ; Para, A. ; Pérez, J. ; Psihas, F. ; Querol, M. ; Renner, J. ; Repond, J. ; Riordan, S. ; Ripoll, L. ; Rodríguez, J. ; Rogers, L. ; Romo-Luque, C. ; Santos, F.P. ; dos Santos, J.M.F. ; Sofka, C. ; Stiegler, T. ; Toledo, J.F. ; Torrent, J. ; Veloso, J.F.C.A. ; Webb, R. ; White, J.T. ; Yahlali, N. ; The, NEXT, collaboration

Resumen: The measurement of the internal 222Rn activity in the NEXT-White detector during the so-called Run-II period with 136Xe-depleted xenon is discussed in detail, together with its implications for double beta decay searches in NEXT. The activity is measured through the alpha production rate induced in the fiducial volume by 222Rn and its alpha-emitting progeny. The specific activity is measured to be (38.1 ± 2.2 (stat.) ± 5.9 (syst.)) mBq/m3. Radon-induced electrons have also been characterized from the decay of the 214Bi daughter ions plating out on the cathode of the time projection chamber. From our studies, we conclude that radon-induced backgrounds are sufficiently low to enable a successful NEXT-100 physics program, as the projected rate contribution should not exceed 0.1 counts/yr in the neutrinoless double beta decay sample.

Idioma: Inglés

DOI: 10.1007/JHEP10(2018)112

Año: 2018

Publicado en: Journal of High Energy Physics 2018, 10 (2018), 112 [27 pp]
ISSN: 1126-6708

Factor impacto JCR: 5.833 (2018)

Categ. JCR: PHYSICS, PARTICLES & FIELDS rank: 4 / 29 = 0.138 (2018) - Q1 - T1

Factor impacto SCIMAGO: 1.016 - Nuclear and High Energy Physics (Q1)

Financiación: info:eu-repo/grantAgreement/EC/FP7/339787/EU/Towards the NEXT generation of bb0nu experimets/NEXT
Financiación: info:eu-repo/grantAgreement/EC/H2020/674896/EU/The Elusives Enterprise: Asymmetries of the Invisible Universe/ELUSIVES
Financiación: info:eu-repo/grantAgreement/EC/H2020/690575/EU/InvisiblesPlus/InvisiblesPlus
Financiación: info:eu-repo/grantAgreement/EC/H2020/740055/EU/Molecule for low diffusion TPCs for rare event searches/MELODIC
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2014-53371-C04
Financiación: info:eu-repo/grantAgreement/ES/MINECO/SEV-2014-0398

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Atóm.Molec.y Nucl. (Dpto. Física Teórica)