Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Signature inversion -- manifestation of drift of the rotational axis in
  triaxial nuclei   A possible scheme of realizing shell model calculations for heavy nuclei is
based on a deformed basis and the projection technique. Here we present a new
development for odd-odd nuclei, in which one starts with triaxially-deformed
multi-quasi-particle configurations, builds the shell-model space through exact
three-dimensional angular-momentum-projection, and diagonalizes a two-body
Hamiltonian in this space. The model enables us to study the old problem of
signature inversion from a different view. With an excellent reproduction of
the experimental data in the mass-130 region, the results tend to interpret the
phenomenon as a manifestation of dynamical drift of the rotational axis with
presence of axial asymmetry in these nuclei.

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The categories of this paper are: math
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: cs
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
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The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con