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Positive Parity States and Some Electromagnetic Transition Properties of Even-odd Erbium Isotopes
Harun Reşit Yazar 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.7
The positive spin states of even-odd erbium isotopes (<sup>159,163,167</sup>Er) were studied within the framework of the interacting boson-fermion model. The calculated positive low-spin state energy spectra of the odd Er isotope were found to agree quite well with the experimental data. The B(E2) values were also calculated and compared with the experimental data.
Harun Re?it YAZAR 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.47 No.4
If the microscopic background of the IBA-2 model is used, a correspondence can be established between the IBA-1 and the IBA-2 model spaces. Since the space of the IBA-1 model can be regarded as a subspace of the IBA-2 model there is a unique way to “project” the operators of the IBA-2 model onto those of the IBA-1 model. This projection can be carried out by using the F-spin formalism. In the IBA-2 model, the lowest states are, indeed, fully symmetric, and in the calculations with the help of this projection, we explore the energy levels, the electric quadrupole transition probabilities B(E2;Ii ! If ), and the -ray E2/M1 mixing ratios for selected transitions of 152~156Gd . For the first time, this projection is shown to be applicable to some heavier isotopes, and the results obtained for the 152~156Gd isotopes are reasonably in good agreement with the previous experimental values.