000057829 001__ 57829
000057829 005__ 20161214123842.0
000057829 0247_ $$2doi$$a10.1140/epjc/s10052-016-4279-2
000057829 0248_ $$2sideral$$a95595
000057829 037__ $$aART-2016-95595
000057829 041__ $$aeng
000057829 100__ $$0(orcid)0000-0002-7158-9794$$aAmaré Tafalla, Julio César$$uUniversidad de Zaragoza
000057829 245__ $$aAssessment of backgrounds of the ANAIS experiment for dark matter direct detection
000057829 260__ $$c2016
000057829 5060_ $$aAccess copy available to the general public$$fUnrestricted
000057829 5203_ $$aA large effort has been carried out to charac- terize the background of sodium iodide crystals within the Annual modulation with NaI Scintillators (ANAIS) project. In this paper, the background models developed for three 12.5 kg NaI(Tl) scintillators produced by Alpha Spectra Inc. and operated at the Canfranc Underground Laboratory are presented together with an evaluation of the background prospects for the full experiment. Measured spectra from threshold to high energy in different conditions are well described by the models based on quantified activities. At the region of interest, crystal bulk contamination is the dominant background source. Contributions from 210 Pb, 40 K, 22 Na and 3 H are the most relevant. Those from 40 K and 22 Na could be efficiently suppressed thanks to anticoincidence operation in a crystals matrix or inside a liquid scintillator veto (LSV), while that from 210Pb has been reduced by improving crystal production methods and 3H production could be reduced by shielding against cosmic rays during production. Assuming the activities of the last characterized detector, for nine crys- tals with a total mass of 112.5 kg the expected background rate is 2.5 counts/(keV kg day) in the region from 1 to 4 keV, which could be reduced at 1.4 counts/(keV kg day) by using a LSV.
000057829 536__ $$9info:eu-repo/grantAgreement/ES/MICINN/CPAN-CSD2007-00042$$9info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio2010-MULTI-DARK-CSD2009-00064$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2011-23749$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2014-55986-P
000057829 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000057829 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000057829 700__ $$0(orcid)0000-0002-6948-5101$$aCebrian Guajardo, Susana$$uUniversidad de Zaragoza
000057829 700__ $$0(orcid)0000-0003-1190-7233$$aCuesta Soria, Clara
000057829 700__ $$0(orcid)0000-0002-9827-2332$$aGarcía Abancens, Eduardo$$uUniversidad de Zaragoza
000057829 700__ $$aMartínez Pérez, María Lucía
000057829 700__ $$0(orcid)0000-0001-7025-061X$$aOliván Monge, Miguel Ángel$$uUniversidad de Zaragoza
000057829 700__ $$aOrtigoza, Y.
000057829 700__ $$0(orcid)0000-0001-8278-6032$$aOrtiz De Solorzano Aurusa, Alfonso
000057829 700__ $$0(orcid)0000-0001-8732-8196$$aPuimedón Santolaria, Jorge Mario$$uUniversidad de Zaragoza
000057829 700__ $$0(orcid)0000-0002-7552-1228$$aSarsa Sarsa, María Luisa$$uUniversidad de Zaragoza
000057829 700__ $$0(orcid)0000-0003-0228-7589$$aVillar Rivacoba, José Ángel$$uUniversidad de Zaragoza
000057829 700__ $$0(orcid)0000-0002-6519-4315$$aVillar Gómez, Patricia$$uUniversidad de Zaragoza
000057829 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDepartamento de Física Teórica$$cFísica Atómica, Molecular y Nuclear
000057829 7102_ $$12002$$2647$$aUniversidad de Zaragoza$$bDepartamento de Física Aplicada$$cOptica
000057829 7102_ $$15007$$2520$$aUniversidad de Zaragoza$$bDepartamento de Informática e Ingeniería de Sistemas$$cIngeniería de Sistemas y Automática
000057829 773__ $$g76, 429 (2016), [15 pp.]$$pEUR PHYS J C$$tEUROPEAN PHYSICAL JOURNAL C$$x1434-6044
000057829 8564_ $$s2751335$$uhttp://zaguan.unizar.es/record/57829/files/texto_completo.pdf$$yVersión publicada
000057829 8564_ $$s11273$$uhttp://zaguan.unizar.es/record/57829/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000057829 909CO $$ooai:zaguan.unizar.es:57829$$particulos$$pdriver
000057829 951__ $$a2016-12-14-12:22:41
000057829 980__ $$aARTICLE