The linear attenuation coefficients of different marble samples (Perlato Beige, Regal Beige and Crema Siva Beige) produced in Amasya were measured. The measurements have been performed at the photon energies of 511, 835 and 1274 keV which were obtained using ^{22}Na and ^{54}Mn sources. The measurements have been performed using a gamma spectrometer which contains 3"×3" NaI(Tl) detector connected to 16384 channel Multi-Channel-Analyser (MCA).
During the production of the radiation source that used in radiotherapy may occur nuclear reactions are very important in terms of human health. ^{137}Cs is used in radiotherapy that consists of fission the ^{235}U core. Because of physical half-live of ^{137}Cs is 30 years, it is advantage for the radioactive half-lives. In this study, radionuclide production reaction cross section for ^{235}U (n,f)^{137}Cs is calculated with TALYS 1.6 nuclear simulation code that based on Monte Carlo.
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