Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Volume Reflection and Volume Refraction of Relativistic Particles in a
  Uniformly Bent Crystal   The scattering of fast charged particles in a bent crystal has been analyzed
in the framework of relativistic classical mechanics. The expressions obtained
for the deflection function are in satisfactory agreement with the experimental
data for the volume reflection of relativistic protons obtained in [1,2,3]. The
features of the scattering of the particles on ring potentials are considered
in a wide range of impact parameters

16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol