Yazar "Bolukdemir, M. H." seçeneğine göre listele

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    The effect of the initial exciton numbers on Fe-54,Fe-56(p, xp) Pre-Equilibrium Reactions
    (Maik Nauka/Interperiodica/Springer, 2011) Bolukdemir, M. H.; Tel, E.; Aydin, A.; Okuducu, S.; Kaplan, A.
    In pre-equilibrium nuclear reactions, the geometry-dependent hybrid model is applied with the use of the neutron and proton densities to investigate the effect of initial exciton numbers on the nucleon emission spectra. The initial exciton numbers calculated with the theoretical neutron and proton densities have been obtained within the Skryme-Hartree-Fock method with SKM* and SLy4 forces on target nuclei in the Fe-54,Fe-56(p, xp) reaction at 61.5-MeV incident proton energy by using a new calculationmethod of Tel et al. Also, the differences between the initial exciton numbers for protons and neutrons as a function of nuclear radius, focusing on systematic discrepancies correlated to differences in the proton and neutron densities have been investigated.
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    Excitation Functions of Some Neutron Production Targets on (d,2n) Reactions
    (Springer, 2010) Kaplan, A.; Buyukuslu, H.; Aydin, A.; Tel, E.; Yildirim, G.; Bolukdemir, M. H.
    Deuterons are weakly bound nuclei which easily undergo break up reactions. This is well known at low energies, around 10 MeV, where deuteron beams have been used to produce neutrons very efficiently. These neutrons have a widely application field such as fission energy production and hybrid reactor systems. In this study, neutron emission cross sections produced by (d,2n) reactions for spallation neutron targets such as Cr-52, Fe-56, Ni-60,Ni-62,Ni-64, Cu-63,Cu-65, W-182,W-183,W-184,W-186, Th-232, U-235 and U-238 have been investigated. Hybrid model and geometry dependent hybrid model were used to calculate the pre-equilibrium neutron-emission cross sections. For the reaction equilibrium process, Weisskopf-Ewing model calculations were selected. The obtained results have been discussed and compared with the available experimental data and found agreement with each other.
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    Improved Formula for (n,He-3) Fusion Reactions Cross Sections Using Optical Model
    (Springer, 2010) Bolukdemir, M. H.; Tel, E.; Akti, N. N.; Aydin, A.; Okuducu, S.
    Non-elastic cross-sections have been calculated by using optical model for (n, He-3) reactions at 14-15 MeV energy. The new empirical formula including optical model non-elastic effects by fitting two parameters for the (n, He-3) reaction cross-sections have been suggested. The excitation function character and reaction Q-values depending on the asymmetry term effect for the (n, He-3) reaction have been investigated. The obtained cross-section formula with new coefficients has been compared with the experimental data and the other fitting formulae existed in the literature and discussed. It has seen that the fit of new formula in this paper is greatly improved with the experimental data.
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    Investigation of neutron skin effect with density dependence by using a new calculation method for initial exciton numbers on pre-equilibrium reactions
    (Iop Publishing Ltd, 2009) Tel, E.; Bolukdemir, M. H.; Okuducu, S.; Aydin, A.; Kaplan, A.
    In this study, we investigated the pre-equilibrium effect by using a new evaluated geometry-dependent hybrid model and a neutron skin effect with density dependence for the (204,206,207)Pb(p, xn) reaction at 25.5MeV incident proton energy. We calculated the initial exciton numbers obtained from the modified Skyrme force based on fitting the fission barriers of heavy deformed nuclei (SKM*) and SLy4 for proton induced reaction on target nuclei (204,206,207)Pb. We calculated, by using a new calculation method, the initial neutron and proton exciton numbers for (204,206,207)Pb from the neutron and proton density and we investigated the shell effect by using an effective nucleon-nucleon interaction with Skyrme force. We also compared the geometry-dependent hybrid model (GDH), newly evaluated with the initial exciton number calculations of the neutron emission spectra of the (204,206,207)Pb(p, xn) reaction, with the values reported in the literature at 25.5MeV incident proton energy. The obtained results were investigated and compared with the pre-equilibrium calculations and experimental results.
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    Investigation of the neutron emission spectra of some deformed nuclei for (n,xn) reactions up to 26 MeV energy
    (Indian Assoc Cultivation Science, 2011) Kaplan, A.; Buyukuslu, H.; Tel, E.; Aydin, A.; Bolukdemir, M. H.
    In this study, neutron-emission spectra produced by (n,xn) reactions up to 26 MeV for some deformed target nuclei as (165)Ho, (181)Ta, (184)W, (232)Th and (238)U have been investigated. Also, the mean free path parameter's effect for (n,xn) neutron-emission spectra has been examined. In the calculations, pre-equilibrium neutron-emission spectra have been calculated by using new evaluated hybrid model and geometry dependent hybrid model, full exciton model and cascade exciton model. The reaction equilibrium component has been calculated by Weisskopf-Ewing model. The obtained results have been discussed and compared with the available experimental data and found agreement with each other.