Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutron Beam Tests of $CsI(Na)$ and $CaF_{2}(Eu)$ Crystals for Dark
  Matter Direct Search   In recent decades, inorganic crystals have been widely used in dark matter
direct search experiments. To contribute to the understanding of the
capabilities of $CsI(Na)$ and $CaF_{2}(Eu)$ crystals, a mono-energetic neutron
beam is utilized to study the properties of nuclear recoils, which are expected
to be similar to signals of dark matter direct detection. The quenching factor
of nuclear recoils in $CsI(Na)$ and $CaF_{2}(Eu)$, as well as an improved
discrimination factor between nuclear recoils and ${\gamma}$ backgrounds in
$CsI(Na)$, are reported.

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The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin