Browsing by Author "Maraş I."
Now showing 1 - 9 of 9
Results Per Page
Sort Options
Item The IBM-1 study for 170-174Yb isotopes(1997) Maraş I.The electromagnetic properties of even-even 170-174Yb isotopes with neutron number 100 ≤ N ≤ 104 are studied within the framework of the first version of the interacting Boson Model (IBM-1). The B(E2) and Q(2+) values of the above nuclei are calculated. Numerical results for 170-174Yb are compared with previous experimental and theoretical values. © Tübi̇tak.Item Nuclear matrix elements of double beta decay in deformed nuclei(2003) Selam C.; Küçükbursa A.; Bircan H.; Aygör H.A.; Babacan T.; Maraş I.; Kökçe A.Nuclear matrix elements (MGT for two-neutrino double beta transitions of selected nuclei were calculated via a QRPA approach by considering the charge-exchange spin-spin interactions in the particle-hole channel among nucleons. Calculations were performed for both spherical and deformed cases of nuclei. As a result of these calculations, it has been seen that, although the value of the nuclear matrix elements in deformation case are 2-4 times smaller when compared with that of the spherical case, it is still 2-8 times greater than the experimental values.Item The investigation of the log(ft) values for the allowed Gamow-Teller transitions of some deformed nuclei(Association for Scientific Research, 2004) Selam C.; Babacan T.; Aygör H.A.; Bircan H.; Küçükbursa A.; Maraş I.The log(ft) values of allowed β± decay between odd-A nuclei for 125≤A≤180 mass region are investigated. Single particle energies and wave functions are calculated by making use of a deformed Woods-Saxon potential. The calculations are performed in the framework of proton-neutron quasi particle random phase approximation (QRPA) including the schematic residual spin-isospin interaction among the nucleons in the particle hole channel. The calculations indicated that the results obtained through using the ΧGT=5.2/A0.7 are more in agreement with experimental observations.Item IBM-1 calculations on the even-even 122-128Te isotopes(Association for Scientific Research, 2005) Küçükbursa A.; Manisa K.; Çiftçi M.; Babacan T.; Maraş I.The 122-128Te isotopes in O(6)- SU(5) transition region were investigated. For these nuclei, the energy levels, B(E2) transition probabilities, and δ(E2/M1) mixing ratios were calculated within framework of the Interacting Boson Model (IBM-1). The results are compared with the experimental data and the previous calculations. It is shown that there is a good agreement between the results found and especially with the experimental ones.Item The study of dependence of the radial parts of 0-→0 + first forbidden β-decay matrix elements on the parameters in Woods-saxon potential(Association for Scientific Research, 2008) Kenar I.; Ünlü S.; Maraş I.In this paper, O-→0+ first forbidden β-decay matrix elements have been calculated. For 206-214Pb→206-214Bi transitions relativistic M ±(ρA,λ=0) and nonrelativistic M±(jA, k=1,λ=0)) matrix elements have been calculated. In this calculations, the eigenfunctions and eigenvalues of Schrodinger equation solved by the more realistic Woods-Saxon potential have been used. The dependence of the radial parts in the matrix elements on the parameters (r0: the radii of nucleus, η: isovector parameter, rc: Coulomb radius and χ diffusion parameter) of Woods-Saxon potentialhas been investigated. © Association for Scientific Research.Item 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.Item 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.Item Effects of computer-assisted instruction with conceptual change texts on removing the misconceptions of radioactivity(Journal for the Education of Gifted Young Scientists, 2015) Yumuşak A.; Maraş I.; Şahin M.Training young scientists, enabling conceptual understanding in science education is quite important. Misconception is one of the important indications for whether the concepts are understood or not. The most important educational tools to remove misconceptions are conceptual change texts. In addition, one of the important methods to remove misconceptions is computer-assisted instruction. The goal of this study is to research the effects of the use of computer-assisted instruction (CAI), conceptual change texts (CCT), computer-assisted instruction with conceptual change texts (CAI+CCT), and use of traditional teaching method (TTM) on removing the misconceptions of science teacher candidates on the subject of radioactivity. Research sample was made of totally 92 students studying at four different groups of senior students in Celal Bayar University, Faculty of Education, Department of Science Education in 2011-2012 academic year. A different teaching method was used in each group. Experimental groups were randomly determined; in the first experimental group, computer-assisted instruction was used (23 students); in the second experimental group, conceptual change texts were used (23 students); in the third experimental group, computer-assisted instruction with conceptual change texts were used (23 students); and the fourth group, on which traditional education method was used, was called control group (23 students). Two-tier misconception diagnostic instrument, which was developed by the researcher, was used as data collection tool of the research. "Nonequivalent Control Groups Experimental Design" was used in this research in order to determine the efficiency of different teaching methods. Obtained data were analyzed by using SPSS 21.0. As a result of the research, it was determined that methods used on experimental groups were more successful than traditional teaching method practiced on control group in terms of removing misconceptions on radioactivity. © 2015 Journal for the Education of Gifted Young Scientists.Item Preliminary results of Sr/Ca ratio study of teeth samples by photoactivation analysis(EDP Sciences, 2016) Kavun Y.; Boztosun I.; Maraş I.; Dapo H.; Segebade C.In this paper, we have performed Photoactivation Analysis (PAA), a non-destructive method, which is used to determine elemental concentration of any sample. This paper presents the first use of this method in medical sciences in Turkey. The method was applied to the determination of Sr/Ca ratios in teeth. The collected teeth samples and standards (SrO and CaCO3) have been irradiated for a fixed time interval with high energy photons. The photons were generated by a clinical linear accelerator (cLINAC). The photon end-point energy was 18 MeV. The energy and the time interval were sufficient to achieve good activation. Afterward, the samples and standards have been analysed with gamma spectroscopic analysis by using an HPGe detector system. By analysing many samples, a database of Sr/Ca ratios will be created at Nuclear Research and Application Center (NUBA). In this paper we present a small subset of the already analysed data as an example of our capabilities and goal. We hope to set an example for future studies. © The Authors, published by EDP Sciences.