Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Davydov-Chaban Hamiltonian with deformation-dependent mass term for
  {\gamma} = 30{\deg}   Motivation : Several theoretical comparisons with experimental data have
recently pointed out that the mass tensor of the collective Bohr Hamiltonian
cannot be considered as a constant and should be taken as a function of the
collective coordinates. Method : The Davydov-Chaban Hamiltonian, describing the
collective motion of {\gamma}-rigid atomic nuclei, is modified by allowing the
mass to depend on the nuclear deformation. Moreover, the eigenvalue problem for
this Hamiltonian is solved for Davidson potential and {\gamma} = 30{\deg}
involving an Asymptotic Iteration Method (AIM). The present model is
conventionally called Z(4)-DDM-D (Deformation Dependent Mass with Davidson
potential), in respect to the so called Z(4) model. Results : Exact analytical
expressions are derived for energy spectra and normalized wave functions, for
the present model. The obtained results show an overall agreement with the
experimental data for 108-116Pd, 128-132Xe, 136;138Ce and 190-198Pt and an
important improvement in respect to other models. Prediction of a new candidate
nucleus for triaxial symmetry is made. Conclusion : The dependence of the mass
on the deformation reduces the increase rate of the moment of inertia with
deformation, removing a main drawback of the model and leading to an improved
agreement with the corresponding experimental data.

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The categories of this paper are: hep-ph
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The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
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The categories of this paper are: math
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
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The categories of this paper are: stat
34
The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
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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: eess
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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: ao-sci