Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of compound nucleus formation via bremsstrahlung emission in
  proton $\alpha$-particle scattering   In this paper a role of many-nucleon dynamics in formation of the compound
$^{5}{\rm Li}$ nucleus in the scattering of protons off $\alpha$-particles at
the proton incident energies up to 20 MeV is investigated. We propose a
bremsstrahlung model allowing to extract information about probabilities of
formation of such nucleus on the basis of analysis of experimental
cross-sections of the bremsstrahlung photons. In order to realize this
approach, the model includes elements of microscopic theory and also
probabilities of formation of the short-lived compound nucleus. Results of
calculations of the bremsstrahlung spectra are in good agreement with the
experimental cross-sections.

35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph