The recent developments of the dynamic deformation model (DDM) make it readily applicable to a wide range of nuclei. We report a study of the even-mass tellurium isotopes from N = 68 to the closed neutron shell at N = 82. Within this region there is experimental evidence for nuclei with the characteristics of vibrational, rotational or y-unstable level sequences. We show that the model is well able to account for these features as typified by level energies, electric quadrupole moments and y a y transition probabilities across this region when the only parameter which changes is the neutron number. For comparison the experimental data were also fitted to IBM-2 and the results from these fits are in general in good agreement with those from the DDM.

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Within the framework of the shell model, we consider the residual interaction to be a surface delta interaction.This interaction has been applied in the calculation of the energy levels of 210 Po, which belong to N = 126 magic closed shell nuclei. The pure and the configuration mixings are applied in the calculations of matrix elements. The predicted energy levels are compared with experimental data.