Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutron-gamma discrimination of CsI(Na) crystals for dark matter
  searches   The luminescent properties of CsI(Na) crystals are studied in this report. By
using a TDS3054C oscilloscope with a sampling frequency of 5 GS/s, we find out
that nuclear recoil signals are dominated by very fast light pulse with a decay
time of ~20 ns, while {\gamma}-ray signals have a decay time of ~600 ns. The
wavelength of nuclear recoil and {\gamma}-ray signals are also different. The
study of n/{\gamma} separation shows that the rejection factor can reach an
order of 10-7 with signal efficiency more than 80% at an equivalent electron
recoil energy of 20 keV or more. Such a property makes CsI(Na) an ideal
candidate for dark matter searches.

2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph