Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isotope effect in yields of nuclear reactions   The analysis results of the isotopic yields for products obtained in
reactions of protons at energies 0.66, 1, 8.1GeV with separated tin isotopes
are presented. The experimental data are compared in form of reactions of
element cross sections for two targets of different isotope compositions. The
scaling behaviour have been shown in the dependence of this ratios from neutron
and proton composition at the reaction products. The discussion of scaling
parameters allows to explain the mechanism of light and medium mass fragment
production.

29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph