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29 March 2024
 
  » arxiv » 1506.3210

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Background analysis and status of the ANAIS dark matter project
J. Amaré ; S. Cebrián ; C. Cuesta ; E. García ; C. Ginestra ; M. Martínez ; M. A. Oliván ; Y. Ortigoza ; A. Ortiz de Solórzano ; C. Pobes ; J. Puimedón ; M. L. Sarsa ; J. A. Villar ; P. Villar ;
Date 10 Jun 2015
AbstractANAIS (Annual modulation with NaI Scintillators) is a project aiming to set up at the new facilities of the Canfranc Underground Laboratory (LSC), a large scale NaI(Tl) experiment in order to explore the DAMA/LIBRA annual modulation positive result using the same target and technique. Two 12.5 kg each NaI(Tl) crystals provided by Alpha Spectra took data at the LSC in the ANAIS-25 set-up. The comparison of the background model for the ANAIS-25 prototypes with the experimental results is presented. ANAIS crystal radiopurity goals have been achieved for Th-232 and U-238 chains, but a Pb-210 contamination out-of-equilibrium was identified, whose origin has been studied. The high light collection efficiency obtained with these prototypes allows to anticipate an energy threshold of the order of 1 keVee. A new detector, with improved performances, was received in March 2015 and very preliminary results are shown.
Source arXiv, 1506.3210
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