Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dissociation of relativistic nuclei in peripheral interactions in
  nuclear track emulsion   Possibilities of the nuclear emulsion technique for the study of the systems
of several relativistic fragments produced in the peripheral interactions of
relativistic nuclei are discussed. The interactions of the $^{10}$B and
$^{9}$Be nuclei in emulsion are taken as an example to show the manifestation
of the cluster degrees of freedom in relativistic fragmentation. For the case
of the relativistic $^{9}$Be nucleus dissociation it is shown that exact
angular measurements play a crucial role in the restoration of the excitation
spectrum of the alpha particle fragments. The energy calibration of the angular
measurements by the $^{9}$Be nucleus enables one to conclude reliably about the
features of internal velocity distributions in more complicated systems of
relativistic $\alpha$ particles.

23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat