Determination of Gamma-ray Attenuation Coefficients at Different Energies in Amasya Marbles

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 $\text{}^{22}Na$ and $\text{}^{54}Mn$ 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).