Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Linear Approximation for the Excitation Energies of single and double
  analog states in the f_{7/2} shell   We find that the excitation energies of single analog states for odd-even
nuclei in the f$_{7/2}$ shell with J=j=7/2$^{-}$ and the J=0$^{+}$ double
analog states in the even-even nuclei are well described by the formulas
$E^{*}(j,T+1) = b (T+X)$ and $E^{*}(0^{+},T+2) = 2b (T+X+0.5)$,respectively,
where $T=\mid N-Z\mid /2$ is usually the ground state isospin. It is remarkable
to note that the parameter X accounts for the departures from the symmetry
energy based predictions.

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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: cond-mat