Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semi-microscopic description of the double backbending in some deformed
  even-even rare earth nuclei   A semi-microscopic model to study the neutron and proton induced backbending
phenomena in some deformed even-even nuclei from the rare earth region, is
proposed. The space of particle-core states is defined by the angular momentum
projection of a quadrupole deformed product state. The backbending phenomena
are described by mixing four rotational bands, defined by a set of angular
momentum projected states, and a model Hamiltonian describing a set of paired
particles moving in a deformed mean field and interacting with a
phenomenological deformed core. The ground band corresponds to the
configuration where all particles are paired while the other rotational bands
are built on one neutron or/and one proton broken pair. Four rare earth
even-even nuclei which present the second anomaly in the observed moments of
inertia are successfully treated within the proposed model.

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The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics