Yazar "Kaplan, Abdullah" seçeneğine göre listele

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  • Küçük Resim
    Öğe
    Calculation of proton total reaction cross sections for some target nuclei in incident energy range of 10-600 MeV
    (Maik Nauka/Interperiodica/Springer, 2010) Büyükuslu, Halim; Kaplan, Abdullah; Aydın, A.; Tel, Eyyüp; Yıldırım, Gürcan
    In this study, proton total reaction cross sections have been investigated for some isotopes such as (12)C, (27)Al, (9)Be, (16)O, (181)Ta, (197)Au, (6)Li, and (14)N by a proton beam up to 600 MeV. Calculation of the proton total cross sections has been carried out by the analytic expression formulated by M.A. Alvi by using Coulomb-modified Glauber theory with the Helm model nuclear form factor. The obtained results have been discussed and compared with the available experimental data and found to be in agreement with each other.
  • Küçük Resim
    Öğe
    The equilibrium and pre-equilibrium triton emission spectra of some target nuclei for (n,xt) reactions up to 45 MeV energy
    (Springer, 2010) Tel, Eyyüp; Kaplan, Abdullah; Aydın, A.; Özkorucuklu, Suat; Büyükuslu, Halim; Yıldırım, Gürcan
    Although there have been significant research and development studies on the inertial and magnetic fusion reactor technology, there is still a long way to go to penetrate commercial fusion reactors to the energy market. Tritium self-sufficiency must be maintained for a commercial power plant. For self-sustaining (D-T) fusion driver tritium breeding ratio should be greater than 1.05. So, working out the systematics of (n,t) reaction cross sections and triton emission differential data are important for the given reaction taking place on various nuclei at different energies. In this study, (n,xt) reactions for some target nuclei as (16)O, (27)Al, (59)Co and (209)Bi have been investigated up to 45 MeV incident neutron energy. In the calculations of the triton emission spectra, the pre-equilibrium and equilibrium effects have been used. The calculated results have been compared with the experimental data taken from the literature.
  • Küçük Resim
    Öğe
    Excitation functions of some neutron production targets on (d,2n) reactions
    (Springer, 2010) Kaplan, Abdullah; Büyükuslu, Halim; Aydın, A.; Tel, Eyyüp; Yıldırım, Gürcan; Bölükdemir, Mustafa Hicabi
    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.
  • Küçük Resim
    Öğe
    Neutron emission epectra of 104,105,106,108,110Pd isotopes for (p,xn) reactions at 21.6 MeV proton incident energy
    (Springer, 2010) Büyükuslu, Halim; Kaplan, Abdullah; Tel, Eyyüp; Aydın, A.; Yıldırım, Gürcan
    Palladium, which is a rare and lustrous silvery-white color from precious metals, plays important role in fusion-fission reactions and different fields of nuclear technology. In addition, it is used for not only cold fusion experiments but also separation of hydrogen isotopes researches for fusion reactors. In this study, neutron-emission spectra produced by (p,xn) reactions for structural fusion material 104,105,106,108,110Pd isotopes have been investigated by a proton beam at 21.6 MeV. Moreover, multiple pre-equilibrium mean free paths constant from internal transition, and the pre-equilibrium and equilibrium level density parameters have been analyzed for some (p,xn) neutron-emission spectra calculated. New evaluated hybrid model and geometry dependent hybrid model, full exciton model and cascade exciton model were used to calculate the pre-equilibrium neutron-emission spectra. For the reaction equilibrium component, Weisskopf-Ewing model calculations were preferred. The obtained results have been discussed and compared with the available experimental data and found agreement with each other.
  • Küçük Resim Yok
    Öğe
    Production cross sections of medical ' in radionuclides
    (Carl Hanser Verlag, 2010) Büyükuslu, Halim; Kaplan, Abdullah; Yıldırım, Gürcan; Aydın, Abdullah; Tel, Eyyup; Bölükdemir, Mustafa Hicabi
    In this study, production routes of medical 110,111 In radionuclides produced by 110Cd(p,n)110In, 111Cd(p, 2n) 110In, 112Cd(p, 3n) 110In, 107Ag(a, n)110In, 109Ag(a, 3n)110In, 111Cd(P, n)111In, 112Cd(p, 2n)111In, 113Cd(p, 3n)111In, 114Cd(P, 4n)111In, 109Ag(a, 2n) 111In, 107Ag(a, y)111In and 113In(n, 3n)111In reactions have been investigated up to 70 MeV incident particle energy. In these calculations, the preequilibrium and equilibrium effects have been investigated. The pre-equilibrium calculations involve the geometry dependent hybrid model and the cascade exciton model. The full exciton model has also been used to investigate the pre-equilibrium direct effects. Equilibrium effects are calculated according to the Weisskopf-Ewing model. The calculated results are compared with the experimental data taken from the literature. © Carl Hanser Verlag,.
  • Küçük Resim
    Öğe
    Theoretical cross sections of Bi-209, Th-232, U-235 and U-238 on deuteron-induced reactions
    (Pergamon-Elsevier Science Ltd, 2010) Büyükuslu, Halim; Kaplan, Abdullah; Tel, Eyyüp; Aydın, A.; Yıldırım, Gürcan; Bölükdemir, Mustafa Hicabi
    There are many application fields for fast neutrons. The main application fields of the fast neutrons are accelerator-driven sub-critical systems (ADS) and fusion-fission (hybrid) reactor systems for fission energy production. Thorium (Th) and uranium (U) are nuclear fuels in fusion-fission (hybrid) reactor systems and bismuth (Bi) is also the target nucleus in the ADS reactor systems. In this study, neutron production cross sections produced by (d, xn) reactions for spallation targets such as Bi-209, Th-232, U-235 and U-238 have been investigated. New evaluated hybrid model and geometry dependent hybrid model have been used to calculate the pre-equilibrium neutron production cross sections. For the reaction equilibrium component, Weisskopf-Ewing model calculations have been preferred. The obtained results have been discussed and compared with the available experimental data and found in agreement with each other. (C) 2010 Elsevier Ltd. All rights reserved.