Cilt:04 Sayı:02 (2017)

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Browsing Cilt:04 Sayı:02 (2017) by Title

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    Ground-state properties of some N=Z nuclei
    (Ankara : Ankara Üniversitesi, 2017) Akkoyun, S.; Bayram, T.; Şentürk, Ş.; Fen Fakültesi
    The ground-state properties of 64Ge, 68Se, 72Kr and 76Sr (N=Z) nuclei have been investigated by using Hartree-FockBogolibov (HFB) method with Sly4 Skyrme forces, Relativistic Mean Field (RMF) model with NL3 and recently proposed DEFNE interaction parameters sets. For determination of ground-state, axially deformed shape and quadrupole moment constrained calculations have been employed in RMF model. The results of the present study have been compared with each other and available experimental data in the literature. The ground-state binding energies, neutron, proton and charge radii, quadrupole moment deformation parameters of these nuclei have been calculated. Furthermore, neutron skin thickness of the above mentioned nuclei as a function of deformation parameter have been obtained and discussed in detail.
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    On the Role of ‘Reciprocal’ of the Strong Coupling Constant in Nuclear Structure
    (Ankara : Ankara Üniversitesi, 2017) Seshavatharam, U. V. S.; Lakshminarayana, S.; Fen Fakültesi
    Considering ‘reciprocal’ of the strong coupling constant as an index of strength of nuclear binding energy, it was reviewed the basics of nuclear binding energy and nuclear stability.
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    Simulation of an anomalous behavior of thermoluminescence glow peak of quartz from Nigeria
    (Ankara : Ankara Üniversitesi, 2017) Oniya, E. O.; Olubi, O. E.; Fen Fakültesi
    Mechanism of the experimentally observed anomalous shift of a thermoluminescence (TL) glow peak that varied with irradiation dose is yet to be fully established. A theory that the anomalous peak must have contained more than one first order composite peaks each with different TL dose characteristics has been one major explanation proposed to explain this observation. This work was undertaken to simulate the anomalous glow peak by using a modified version of a previously proposed model and numerically solving sets of simultaneous differential equations governing the stages of TL phenomena (excitation, relaxation and heating). In the modified model, two additional electron trapping centers were incorporated in order to simulate accurately this glow curve. Computerized glow curve deconvolution (CGCD) analyses was carried out on the simulated glow peak in attempt to retrieve back the electron trapping center energies and to identify their respective peak positions. The outcome of this confirmed the peak to be possibly composite in nature comprising of three overlapping glow peaks at 288, 300 and 317oC with respective energy gaps of 1.70, 1.73 and 1.75eV. It is therefore further substantiated that this kind of temperature shift of peak with dose resulting from composite glow peaks is possible.