Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Description of alpha-clustering of 8Be nucleus states in high-precision
  theoretical approach   Scrupulous theoretical study of 8Be nucleus states, both clustered and
non-clustered, is performed over a wide range of the excitation energies. The
quantities which characterize the degree of the alpha-clustering of these
states: spectroscopic factors, cluster form factors as well as the alpha-decay
widths are computed in the framework of an accurate ab initio approach
developed. Other basic properties of 8Be spectrum: the binding and excitation
energies, mean values of the isospin are calculated simultaneously. In the
majority of instances the results of the computations turn out to be in a good
agreement with the spectroscopic data. A number of predictions are made and
corresponding verification experiment is proposed. Prospects of the developed
approach for nuclear spectroscopy are demonstrated.

31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ