Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical simulation and experimental study of PbWO4/EPDM and
  Bi2WO6/EPDM for the shielding of {\gamma}rays   The MCNP5 code was employed to simulate the {\gamma}ray shielding capacity of
tungstate composites. The experimental results were applied to verify the
applicability of the Monte Carlo program. PbWO4 and Bi2WO6 were prepared and
added into ethylene propylene diene monomer (EPDM) to obtain the composites,
which were tested in the {\gamma}ray shielding. Both the theoretical simulation
and experiments were carefully chosen and well designed. The results of the two
methods were found to be highly consistent. In addition, the conditions during
the numerical simulation were optimized and double-layer {\gamma}ray shielding
systems were studied. It was found that the {\gamma}-ray shielding performance
can be influenced not only by the material thickness ratio but also by the
arrangement of the composites.

34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat