Preliminary results of ANAIS-25

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. 250kg of ultrapure NaI(Tl) crystals will be used as a target, divided into 20 modules, each coupled to two...

Full description

Saved in:
Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2014-04, Vol.742, p.187-190
Main Authors: Amaré, J., Cebrián, S., Cuesta, C., García, E., Ginestra, C., Martínez, M., Oliván, M.A., Ortigoza, Y., Ortiz de Solórzano, A., Pobes, C., Puimedón, J., Sarsa, M.L., Villar, J.A., Villar, P.
Format: Article
Language:English
Subjects:
Alpha decay
Annual modulation
Background radiation
Crystals
Dark matter
Detectors
Modulation
Potassium
Scintillation
Sodium iodide scintillators
Spectrometers
Underground physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. 250kg 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 12.5kg 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.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2013.09.019