Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fitting Single Particle Energies in $sdgh$ Major Shell   We have performed two kinds of non-linear fitting procedures to the
single-particle energies in the $sdgh$ major shell to obtain better shell model
results. The low-lying energy eigenvalues of the light Sn isotopes with
$A=103-110$ in the $sdgh$-shell are calculated in the framework of the nuclear
shell model by using CD-Bonn two-body effective nucleon-nucleon interaction.
The obtained energy eigenvalues are fitted to the corresponding experimental
values by using two different non-linear fitting procedures, i.e., downhill
simplex method and clonal selection method. The unknown single-particle
energies of the states $2s_{1/2}$, $1d_{3/2}$, and $0h_{11/2}$ are used in the
fitting methods to obtain better spectra of the $^{104,106,108,110}$Sn
isotopes. We compare the energy spectra of the $^{104,106,108,110}$Sn and
$^{103,105,107,109}$Sn isotopes with/without a nonlinear fit to the
experimental results.

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The categories of this paper are: dg-ga
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: physics
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: eess