Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Monopole Shift in Odd Neutron-Rich F Isotopes: A Shell Model Description   Monopole shift in the proton states in odd neutron rich F isotopes has been
studied with neutron number changing from N = 10 to 20 for three different
interactions. The variation of monopole shift point out towards appearance of
shell closure at N = 14 and N = 16 and its disappearance at N = 20. Low lying
states of odd F isotopes have also been calculated in the limited configuration
space of {\it sd} shells for these interactions.

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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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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: plasm-ph
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The categories of this paper are: nlin
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: math