Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 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. 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.

12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
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The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom