Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interplay between isoscalar and isovector correlations in neutron-rich
  nuclei   The interplay between isoscalar and isovector correlations in the 1$^{-}$
states in neutron-rich (N$\neq$Z) even-even nuclei is studied, taking examples
of the nuclei, $^{22}_{8}$O$_{14}$ and $^{24}_{8}$O$_{16}$. The excitation
modes explored are isovector dipole and isoscalar compression dipole modes. The
self-consistent Hartree-Fock plus the random-phase approximation with the
Skyrme interaction, SLy4, is solved in coordinate space so as to take properly
into account the continuum effect. The isovector peak induced by isoscalar
correlation, the isoscalar peak induced by isovector correlation, and the
possible collective states made by both isoscalar and isovector correlations,
("iS-iV pigmy resonance"), are shown. The strong neutron-proton interaction in
nuclei can be responsible for controlling the isospin structure of normal
modes. It is explicitly shown that in the scattering by isoscalar (isovector)
particles on N$\neq$Z even-even nuclei isovector (isoscalar) strength in
addition to isoscalar (isovector) strength may be populated.

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The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
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The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th