000079690 001__ 79690 000079690 005__ 20220120225832.0 000079690 0247_ $$2doi$$a10.1140/epjc/s10052-019-6911-4 000079690 0248_ $$2sideral$$a112464 000079690 037__ $$aART-2019-112464 000079690 041__ $$aeng 000079690 100__ $$0(orcid)0000-0002-7158-9794$$aAmaré, J.$$uUniversidad de Zaragoza 000079690 245__ $$aAnalysis of backgrounds for the ANAIS-112 dark matter experiment 000079690 260__ $$c2019 000079690 5060_ $$aAccess copy available to the general public$$fUnrestricted 000079690 5203_ $$aThe ANAIS (Annual modulation with NaI(Tl) Scintillators) experiment aims at the confirmation or refutation of the DAMA/LIBRA positive annual modulation signal in the low energy detection rate, using the same target and technique, at the Canfranc Underground Laboratory (LSC) in Spain. ANAIS-112, consisting of nine 12.5 kg NaI(Tl) modules produced by Alpha Spectra Inc. in a 3 × 3 matrix configuration, is taking data smoothly in “dark matter search” mode since August, 2017, after a commissioning phase and operation of the first detectors during the last years in various set-ups. A large effort has been carried out within ANAIS to characterize the background of sodium iodide detectors, before unblinding the data and performing the first annual modulation analysis. Here, the background models developed for all the nine ANAIS-112 detectors are presented. Measured spectra from threshold to high energy in different conditions are well described by the models based on quantified activities independently estimated following several approaches. In the region from 1 to 6keVee the measured, efficiency corrected background level is 3.58±0.02keV-1kg-1day-1; NaI crystal bulk contamination is the dominant background source being 210 Pb , 40 K , 22 Na and 3 H contributions the most relevant ones. This background level, added to the achieved 1keVee analysis threshold (thanks to the outstanding light collection and robust filtering procedures developed), allow ANAIS-112 to be sensitive to the modulation amplitude measured by DAMA/LIBRA, and able to explore at three sigma level in 5 years the WIMP parameter region singled out by this experiment. © 2019, The Author(s). 000079690 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio2010-MULTI-DARK-CSD2009-00064$$9info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio2010-MULTI-DARK-CPANCSD2007-00042$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2014-55986-P$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2017-83133-P 000079690 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/ 000079690 590__ $$a4.389$$b2019 000079690 592__ $$a1.763$$b2019 000079690 591__ $$aPHYSICS, PARTICLES & FIELDS$$b7 / 29 = 0.241$$c2019$$dQ1$$eT1 000079690 593__ $$aPhysics and Astronomy (miscellaneous)$$c2019$$dQ1 000079690 593__ $$aEngineering (miscellaneous)$$c2019$$dQ1 000079690 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000079690 700__ $$0(orcid)0000-0002-6948-5101$$aCebrián, S.$$uUniversidad de Zaragoza 000079690 700__ $$0(orcid)0000-0002-8100-1368$$aCoarasa, I.$$uUniversidad de Zaragoza 000079690 700__ $$0(orcid)0000-0003-1190-7233$$aCuesta, C. 000079690 700__ $$0(orcid)0000-0002-9827-2332$$aGarcía, E.$$uUniversidad de Zaragoza 000079690 700__ $$0(orcid)0000-0002-9043-4691$$aMartínez, M.$$uUniversidad de Zaragoza 000079690 700__ $$0(orcid)0000-0001-7025-061X$$aOliván, M.A.$$uUniversidad de Zaragoza 000079690 700__ $$0(orcid)0000-0002-2793-7544$$aOrtigoza, Y. 000079690 700__ $$0(orcid)0000-0001-8278-6032$$aOrtiz de Solórzano, A.$$uUniversidad de Zaragoza 000079690 700__ $$0(orcid)0000-0001-8732-8196$$aPuimedón, J.$$uUniversidad de Zaragoza 000079690 700__ $$0(orcid)0000-0001-9508-8567$$aSalinas, A.$$uUniversidad de Zaragoza 000079690 700__ $$0(orcid)0000-0002-7552-1228$$aSarsa, M.L.$$uUniversidad de Zaragoza 000079690 700__ $$0(orcid)0000-0003-0228-7589$$aVillar, J.A. 000079690 700__ $$0(orcid)0000-0002-6519-4315$$aVillar, P.$$uUniversidad de Zaragoza 000079690 7102_ $$15007$$2520$$aUniversidad de Zaragoza$$bDpto. Informát.Ingenie.Sistms.$$cÁrea Ingen.Sistemas y Automát. 000079690 7102_ $$12004$$2X$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Técnica. Lab. y Talleres 000079690 7102_ $$15008$$2800$$aUniversidad de Zaragoza$$bDpto. Ingeniería Electrón.Com.$$cÁrea Teoría Señal y Comunicac. 000079690 7102_ $$12002$$2647$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Óptica 000079690 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Atóm.Molec.y Nucl. 000079690 773__ $$g79 (2019), 412 [22 pp.]$$pEur. phys. j., C$$tEuropean Physical Journal C$$x1434-6044 000079690 8564_ $$s1196722$$uhttps://zaguan.unizar.es/record/79690/files/texto_completo.pdf$$yVersión publicada 000079690 8564_ $$s111040$$uhttps://zaguan.unizar.es/record/79690/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000079690 909CO $$ooai:zaguan.unizar.es:79690$$particulos$$pdriver 000079690 951__ $$a2022-01-20-22:55:07 000079690 980__ $$aARTICLE