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    Determination of (n,2n) Reaction Cross Sections for Some Nuclei with Asymmetry Parameter
    (Springer, 2010) Sarpun, İsmail Hakkı; Yalim, Hüseyin Ali; Ünal, Rıdvan; Oruncak, Bekir; Aydin, Abdullah; Kaplan, Abdullah; Tel, Eyüp
    The (n,2n) reaction cross sections for targets of Tl-203,Tl-205, Pb-204,Pb-206,Pb-207,Pb-208, Bi-209, Th-232 and U-238 were calculated both theoretically and semi-empirically. Theoretical calculations were done using two different computer codes: PCROSS computer code for the full exciton model and ALICE/ASH-2006 computer code for the geometry dependent hybrid (GDH) model with the incident neutron energy up to 25 MeV. Semi-empirical calculations were done using formulas derived by several researchers. The obtained results have been discussed and compared with the available experimental data taken from the literature. The different nuclear reaction program codes used in the present study show considerable differences depending upon the selected energy range. Especially PCROSS calculation results show a disagreement above the incident energy of about 16 MeV for all the studied nuclei. Moreover, even though the graphs qualitatively agree in shape, they differ in magnitude below 15 MeV.
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    Double Differential Proton Emission Cross Sections for Structural Fusion Materials Mg-24
    (Amer Inst Physics, 2018) Demirelli, Gozde; Sarpun, Ismail H.; Oruncak, Bekir; Tel, Eyyup; Aydin, Abdullah
    In this study, double differential proton emission cross sections of 24Mg target nuclei have been theoretically calculated by the TALYS 1.8 code at 14 MeV neutron incident energy. Theoretical calculated cross sections were compared with available experimental data in EXFOR nuclear data library. Furthermore, in theoretical calculations direct, compound and pre-equilibrium reaction contribution have been investigated. Theoretical and experimental values are in good agreement for all given emission angles.
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    Investigation of Nucleon Mean Free Path Dependence in Tritium Emission Spectra Produced by Proton Induced Reactions at 62 MeV
    (Springer, 2010) Yalim, Hueseyin Ali; Aydin, Abdullah; Sarpun, Ismail Hakki; Unal, Ridvan; Oruncak, Bekir; Kaplan, Abdullah; Tel, Eyyup
    This study aims on the effect of nucleon mean free path on differential cross sections of tritium-emission spectra for (p, H-3) reactions on Al-27, Fe-54,Fe- 56, Y-89, Sn-120, Au-197, Pb-208 and Bi-209 induced by 62 MeV protons in the pre-equilibrium reaction mechanisms. The pre-equilibrium calculations were carried out by using the geometry dependent hybrid model. The calculated results are compared with experimental data existing in literature and found to be in good agreement. Furthermore, using different multiplication factor for the mean free path in the calculation changes the differential cross sections of tritium emission spectra.