Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search of cluster structure in nuclei via analysis of bremsstrahlung
  emission   We investigate emission of bremsstrahlung photons during scattering of
$\alpha$-particles off nuclei. For that, we construct bremsstrahlung model for
$\alpha$-nucleus scattering, where a new formalism for coherent and incoherent
bremsstrahlung emissions in elastic scattering and mechanisms in inelastic
scattering is added. Basing of this approach, we analyze experimental
bremsstrahlung cross-sections in the scattering of $\alpha$-particles off the
\isotope[59]{Co}, \isotope[116]{Sn}, \isotope[\rm nat]{Ag} and
\isotope[197]{Au} nuclei at 50 MeV of $\alpha$-particles beam measured at the
Variable Energy Cyclotron Centre, Calcutta. We observe oscillations in the
calculated spectra for elastic scattering for each nucleus. But, for
\isotope[59]{Co}, \isotope[116]{Sn} and \isotope[\rm nat]{Ag} we obtain good
agreement between calculated coherent spectrum with incoherent contribution for
elastic scattering with experimental data in the full photon energy region. For
heavy nucleus \isotope[197]{Au} we find that (1) Oscillating behavior of the
calculated spectrum of coherent emission in elastic scattering is in
disagreement with experimental data, (2) Inclusion of incoherent emission
improves description of the data, but summarized spectrum is in satisfactory
agreement with the experimental data. To understand unknown modification of
wave function for scattering, we add new mechanisms of inelastic scattering to
calculations and extract information about unknown new amplitude of such
mechanisms from experimental data analysis. This amplitude has maxima at some
energies, that characterizes existence of states of the most compact structures
(clusters) in nucleus-target. We explain origin of oscillations in the
bremsstrahlung spectra for elastic scattering (at first time). New information
about coherent and incoherent contributions is extracted for studied reactions.

17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
18
The categories of this paper are: econ