Preliminary results of ANAIS-25

被引：31

作者：

Amare, J. ^{[1
,2
]}

Cebrian, S. ^{[1
,2
]}

Cuesta, C. ^{[1
,2
]}

Garcia, E. ^{[1
,2
]}

Ginestra, C. ^{[1
,2
]}

Martinez, M. ^{[1
,2
,3
]}

Olivan, M. A. ^{[1
,2
]}

Ortigoza, Y. ^{[1
,2
]}

Ortiz de Solorzano, A. ^{[1
,2
]}

Pobes, C. ^{[1
,2
]}

Puimedon, J. ^{[1
,2
]}

Sarsa, M. L. ^{[1
,2
]}

Villar, J. A. ^{[1
,2
]}

Villar, P. ^{[1
,2
]}

机构：

[1] Univ Zaragoza, Lab Fis Nucl & Astroparticulas, E-50009 Zaragoza, Spain

[2] Lab Subterraneo Canfranc, Canfranc Estn 22880, Huesca, Spain

[3] Fdn ARAID, Zaragoza 50018, Spain

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2014年 / 742卷

关键词：

Dark matter; Annual modulation; Underground physics; Sodium iodide scintillators;

D O I：

10.1016/j.nima.2013.09.019

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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 Nal(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. Published by Elsevier B.V.

引用

页码：187 / 190

页数：4

共 3 条

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Cebrian, S. ;

Cuesta, C. ;

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Garcia, E. ;

Ginestra, C. ;

Gomez, H. ;

Martinez, M. ;

Olivan, M. A. ;

Ortigoza, Y. ;

Ortiz de Solorzano, A. ;

Pobes, C. ;

Puimedon, J. ;

Sarsa, M. L. ;

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