en Radiation Biology Radiation Biology تحقيق بديع Original Research <span style="font-weight: bold">Background:</span> Radiation shielding properties is an important for a material wish can be used the photon attenuation coefficients of clay produced using different rate of boron have been measured for the purpose of radioactive waste disposal. <span style="font-weight: bold">Materials and Methods:</span> The measurement has been performed using gamma spectrometer contains NaI (Tl) detector at the photon energies of 662, 1173 and 1332 keV. The mean free path and transmission rate of the samples were also obtained. <span style="font-weight: bold">Results:</span> From the measurement of linear attenuation coefficients it was found that using boron in the clay increased the linear attenuation coefficients. <span style="font-weight: bold">Conclusion:</span> It can be concluded from this work that the boron is effective to shield radiation and it can be used for storing of nuclear waste. Iran. J. Radiat. Res., 2011 9(1): 37-40 Photon attenuation coefficient, radioactive waste, boron, clay, NaI (Tl). 37 40 http://ijrr.com/browse.php?a_code=A-10-1-382&slc_lang=en&sid=1 I. Akkurt iskender@fef.sdu.edu.tr 790031947532846002222 790031947532846002222 Yes H. Canakci 790031947532846002223 790031947532846002223 No