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In this study, the new calculations on the excitation functions of 18O(p,n)18F, 68Zn(p,n)68Ga, 68Zn(p,2n)67Ga, 112Cd(p,2n)111In, 209Bi(p,n)209Po and 232Th(p,n)232Pa reactions have been carried out in the 5- 50 MeV incident proton energy range. In these calculations, the pre-equilibrium and equilibrium effects have been investigated. The pre-equilibrium calculations involve hybrid model, geometry dependent hybrid model, the cascade exciton model and full exciton model. Equilibrium effects are calculated according to Weisskopf–Ewing model. The calculated results are compared with the experimental data taken from the literature. Key words: Medical radioisotope, Positron emitting radioisotope, Accelerator Driven Systems, Pre-equilibrium reactions, Proton cyclotron BAZI TIBBI RADYOIZOTOPLAR VE SPALLASYON NOTRON KAYNAKLARINDA KULLANILAN HEDEF CEKIRDEKLER ICIN PROTON SIKLOTRON URETIM TESIR KESITLERININ YENI HESAPLAMALARI Ozet: Bu calismada, 5-50 MeV proton gelme enerji araliginda; 18O(p,n)18F, 68Zn(p,n)68Ga, 68Zn(p,2n)67Ga, 112Cd(p,2n)111In, 209Bi(p,n)209Po ve 232Th(p,n)232Pa reaksiyonlarinin uyarilma fonksiyonlarinin yeni hesaplamalari yapilmistir. Bu hesaplamalarda, denge ve denge-oncesi etkiler incelenmistir. Denge oncesi hesaplamalar icin; hibrid model, geometri bagimli hibrid model, cascade exiton model, ve full exciton model kullanilmistir. Denge etkileri de Weisskopf–Ewing modeline gore hesaplanmistir. Hesaplanan sonuclar literaturden alinan deneysel verilerle karsilastirilmistir. Anahtar kelimeler: Tibbi radyoizotop, Pozitron yayici radyoizotop, Hizlandirici surumlu sistemler, Denge-oncesi reaksiyonlar, Proton siklotron

NEW CALCULATIONS OF PROTON CYCLOTRON PRODUCTON CROSS SECTIONS FOR SOME MEDICAL RADIOISOTOPES AND TARGET NUCLEI USED ON THE SPALLATION NEUTRON SOURCES