Preliminary results of ANAIS-25

Amaré, J. ; Cebrián, S. (Universidad de Zaragoza) ; Cuesta, C. ; García, E. ; Ginestra, C. ; Martínez, M. (Universidad de Zaragoza) ; Oliván, M.A. ; Ortigoza, Y. ; Ortiz de Solórzano, A. (Universidad de Zaragoza) ; Pobes, C. ; Puimedón, J. (Universidad de Zaragoza) ; Sarsa, M.L. ; Villar, J.A. ; Villar, P.

Resumen: The ANAIS (Annual Modulation with NaI(Tl) Scintillators) experiment aims at the confirmation of the DAMA/LIBRA signal using the same target and technique at the Canfranc Underground Laboratory. 250 kg of ultrapure NaI(Tl) crystals will be used as a target, divided into 20 modules, each coupled to two photomultipliers. Two NaI(Tl) crystals of 12.5 kg each, grown by Alpha Spectra from a powder having a potassium level under the limit of our analytical techniques, form the ANAIS-25 set-up. The background contributions are being carefully studied and preliminary results are presented: their natural potassium content in the bulk has been quantified, as well as the uranium and thorium radioactive chains presence in the bulk through the discrimination of the corresponding alpha events by PSA, and due to the fast commissioning, the contribution from cosmogenic activated isotopes is clearly identified and their decay observed along the first months of data taking. Following the procedures established with ANAIS-0 and previous prototypes, bulk NaI(Tl) scintillation events selection and light collection efficiency have been also studied in ANAIS-25.

Idioma: Inglés

DOI: 10.1016/J.NIMA.2013.09.019

Año: 2014

Publicado en: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 742 (2014), 187-190
ISSN: 0168-9002

Factor impacto JCR: 1.216 (2014)

Categ. JCR: NUCLEAR SCIENCE & TECHNOLOGY rank: 9 / 34 = 0.265 (2014) - Q2 - T1
Categ. JCR: SPECTROSCOPY rank: 29 / 44 = 0.659 (2014) - Q3 - T2
Categ. JCR: INSTRUMENTS & INSTRUMENTATION rank: 31 / 56 = 0.554 (2014) - Q3 - T2
Categ. JCR: PHYSICS, PARTICLES & FIELDS rank: 22 / 27 = 0.815 (2014) - Q4 - T3

Financiación: info:eu-repo/grantAgreement/ES/MICINN/CPAN-CSD2007-00042
Financiación: info:eu-repo/grantAgreement/ES/MICINN/FPI-CSD2009-00064
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2011-23749

Tipo y forma: Artículo (PostPrint)

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