Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Properties of $^{8}$Be and $^{12}$C deduced from the folding--potential
  model   The $\alpha$--$\alpha$ differential cross sections are analyzed in the
optical model using a double--folded potential. With the knowledge of this
potential bound and resonance--state properties of $\alpha$--cluster states in
$^{8}$Be and $^{12}$C as well as astrophysical S--factors of
$^{4}$He($\alpha$,$\gamma$)$^{8}$Be and $^{8}$Be($\alpha$,$\gamma$)$^{12}$C are
calculated. $\Gamma_{\gamma}$--widths and B(E2)--values are deduced.

14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc