Total attenuation cross sections of several elements have been measured for 360 and 511 KeV photons by using formula σtot= μ/ρ (A/N) x 1024, the values are compared with the values calculated from the data of Hubbell for the individual elements.The radioactive sources used in the experiments were Ba133 and Na22. Total attenuation cross sections for several elements have been measured for gamma rays from 360 and 511 keV photons using the well type scintillation spectrometer. Measurements have been made to determine total photon cross sections very accurately by using a narrow collimated beam method which effectively excluded correction due to small angle and multiple scattering of photons. The values of Total attenuation cross sections are found to be in good agreement with the theory.
