000032211 001__ 32211
000032211 005__ 20190520103314.0
000032211 0247_ $$2doi$$a10.1142/S0217751X14430106
000032211 0248_ $$2sideral$$a86122
000032211 037__ $$aART-2014-86122
000032211 041__ $$aeng
000032211 100__ $$aCuesta, Clara
000032211 245__ $$aAnalysis of the 40K contamination in NaI(Tl) crystals from different providers in the frame of the ANAIS project
000032211 260__ $$c2014
000032211 5060_ $$aAccess copy available to the general public$$fUnrestricted
000032211 5203_ $$aNaI(Tl) large crystals are applied in the search for galactic dark matter particles through their elastic scattering off the target nuclei in the detector by measuring the scintillation signal produced. However, energies deposited in the form of nuclear recoils are small, which added to the low efficiency to convert that energy into scintillation, makes that events at or very near the energy threshold, attributed either to radioactive backgrounds or to spurious noise (nonbulk NaI(Tl) scintillation events), can compromise the sensitivity goals of such an experiment. DAMA/LIBRA experiment, using 250 kg NaI(Tl) target, reported first evidence of the presence of an annual modulation in the detection rate compatible with that expected for a dark matter signal just in the region below 6 keVee (electron equivalent energy). In the frame of the ANAIS (Annual modulation with NaI Scintillators) dark matter search project a large and long effort has been carried out in order to understand the origin of events at very low energy in large sodium iodide detectors and develop convenient filters to reject those nonattributable to scintillation in the bulk NaI(Tl) crystal. 40K is probably the most relevant radioactive contaminant in the bulk for NaI(Tl) detectors because of its important contribution to the background at very low energy. ANAIS goal is to achieve levels at or below 20 ppb natural potassium
In this paper we will report on our effort to determine the 40K contamination in several NaI(Tl) crystals, by measuring in coincidence between two (or more) of them. Results obtained for the 40K content of crystals from different providers will be compared and prospects of the ANAIS dark matter search experiment will be briefly reviewed
000032211 536__ $$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2011-23749$$9info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio2010-MULTI-DARK-CSD2009-00064$$9info:eu-repo/grantAgreement/ES/MICINN/CPAN-CSD2007-00042
000032211 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000032211 590__ $$a1.699$$b2014
000032211 591__ $$aPHYSICS, PARTICLES & FIELDS$$b15 / 27 = 0.556$$c2014$$dQ3$$eT2
000032211 591__ $$aPHYSICS, NUCLEAR$$b12 / 21 = 0.571$$c2014$$dQ3$$eT2
000032211 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000032211 700__ $$aAmaré, Julio
000032211 700__ $$0(orcid)0000-0002-6948-5101$$aCebrián, Susana$$uUniversidad de Zaragoza
000032211 700__ $$0(orcid)0000-0002-9827-2332$$aGarcía, Eduardo$$uUniversidad de Zaragoza
000032211 700__ $$0(orcid)0000-0002-4643-2138$$aGinestra, Carlos
000032211 700__ $$aMartínez, María
000032211 700__ $$aOliván, Miguel A
000032211 700__ $$aOrtigoza, Ysrael
000032211 700__ $$0(orcid)0000-0001-8278-6032$$aOrtíz de Solórzano, Alfonso$$uUniversidad de Zaragoza
000032211 700__ $$aPobes, Carlos
000032211 700__ $$0(orcid)0000-0001-8732-8196$$aPuimedón, Jorge$$uUniversidad de Zaragoza
000032211 700__ $$aSarsa, María Luisa
000032211 700__ $$aVillar, José Ángel
000032211 700__ $$aVillar, Patricia
000032211 7102_ $$12004$$2X$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Técnica. Lab. y Talleres
000032211 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Atóm.Molec.y Nucl.
000032211 773__ $$g29 (2014), 1443010 [17 pp]$$pInt. J. Mod. Phys. A$$tINTERNATIONAL JOURNAL OF MODERN PHYSICS A$$x0217-751X
000032211 8564_ $$s2217379$$uhttps://zaguan.unizar.es/record/32211/files/texto_completo.pdf$$yVersión publicada
000032211 8564_ $$s52064$$uhttps://zaguan.unizar.es/record/32211/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000032211 909CO $$ooai:zaguan.unizar.es:32211$$particulos$$pdriver
000032211 951__ $$a2019-05-20-10:29:52
000032211 980__ $$aARTICLE