Browsing by Author "Türkan N."

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    Investigation of the multipolarity of electromagnetic transitions in 88,90Kr nuclei
    (2006) Türkan N.; Olgun D.; Uluer I.; Inan S.
    We have determined the most appropriate Hamiltonian that is needed for present calculations of nuclei about the A≅80 region by the view of Interacting Boson Model-2 (IBM-2). After obtaining the best Hamiltonian parameters, level energies and B(E2) probabilities of some transitions in 88,90Kr nuclei were estimated. Results are compared with previous experimental and theoretical data and it is observed that they are in good agreement. Finally, R1 = B(E2; 41 → 2 1)/B(E2; 21 → 01), R2 = B(E2; 21 → 21)/B(E2; 21 → 01), R3 = B(E2; 02 → 21)/B(E2; 21 → 01), R4 = B(E2; 22 → 0 1)/B(E2; 22 → 21), R5 = B(E2; 31 → 21)/B(E2; 31 → 41), R6 = B(E2; 42 → 41)/B(E2; 42 → 22) and R7 = B(E2; 41 → 2 1)/B(E2; 22 → 21) ratios are compared with the values of dynamic symmetry limits. (SO(6), SU(5), SU(3)).© TÜBİTAK.
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    Comparison of IBM-2 calculations with X(5) critical point symmetry for low-lying states in 144-154Nd
    (Association for Scientific Research, 2008) Inan S.; Türkan N.; Inci I.; Olgun D.
    The X(5) would take place when moving continously from the pure U(5) symmetry to the SU(3) symmetry and it implies a definite relations among the level energies and among the E2 transition strengths. It was recently shown that a signature of phase transition is observed in the chain of Sm, Mo and Nd isotopes, where 152Sm, 104Mo and 150Nd display the predicted features of the X(5) symmetry and mark therefore the critical point. However, more detailed studies and experiments are needed to get ideas about this signature. Without entering into detail we have firstly compared the results obtained in our previous study [15] of 144-154Nd with that of the limits in X(5) symmetry and then given a clear descripton about the validity of the Hamiltonian parameters used in the study. At the end, we have concluded that some of Nd isotopes display X(5) symmetry features. © Association for Scientific Research.
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    The investigation of even-even 114-120Xe isotopes by the framework of IBA
    (Association for Scientific Research, 2010) Maraş I.; Gümüş R.; Türkan N.
    In this work, the ground state, quasi beta and quasi gamma band energies of 114,116,118,120Xe isotopes have been investigated by using the both (IBM-1 and IBM-2) versions of interacting boson model (IBM). In calculations, the theoretical energy levels have been obtained by using PHINT and NP-BOS program codes. The presented results are compared with the experimental data in respective tables and figures. At the end, it was seen that the obtained theoretical results are in good agreement with the experimental data. © Association for Scientific Research.
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    The investigation of 130,132Te by IBM-2
    (Association for Scientific Research, 2012) Inan S.; Türkan N.; Maraş I.
    In this study, we determined the most appropriate Hamiltonian that is needed for present calculations of nuclei in the A ≅ 130 region by interacting boson model. The second version of interacting boson model (IBM-2) has been widely used for describing the quadrupole collective states of the medium heavy nuclei. The proton and neutron variables are distinguished when this version of the model is applied. Because it is important to describe the proton and neutron variables explicitely. Using the best-fitted values of parameters in the Hamiltonian of the IBM-2, we have calculated energy levels and B(E2) values for 130,132Te. The results were compared with the previous experimental and theoretical data and it is observed that they are in good agreement. Some B(E2) values that are still not known so far are stated and the set of parameters used in these calculations is the best approximation that has been carried out so far. It has turned out that the interacting boson approximation (IBA) is fairly reliable for the calculation of spectra in the entire set of such Te isotopes.