Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge Radii of beta-Stable Nuclei   In previous work it was shown that the radius of nucleus R is determined by
the alpha-cluster structure and can be estimated on the number of
alpha-clusters disregarding to the number of excess neutrons. A hypothesis also
was made that the radius R_m of a beta-stable isotope, which is actually
measured at electron scattering experiments, is determined by the volume
occupied by the matter of the core plus the volume occupied by the peripheral
alpha-clusters. In this paper it is shown that the condition R_m = R restricts
the number of excess neutrons filling the core to provide the beta-stability.
The number of peripheral clusters can vary from 1 to 5 and the value of R for
heavy nuclei almost do not change, whereas the number of excess neutrons should
change with the number of peripheral clusters to get the value of R_m close to
R. It can explain the path of the beta-stability and its width. The radii R_m
of the stable isotopes with 12 =< Z =< 83 and the alpha-decay isotopes with 84
=< Z =< 116 that are stable to beta-decay have been calculated.

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The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph