Mass attenuation coefficients of YBaCuO and BiPbSrCaCuO superconductors at 511, 661 and 1274keV energies

Mass attenuation coefficients of the YBaCuO and BiPbSrCaCuO superconductors were determined at 511, 661, and 1274keV photon energies. The samples were irradiated using 0.5mCi137Cs and 2mCi22Na radioactive sources. The photons crossing the samples were counted using a multi-channel analyzer with a NaI(Tl) detector. The Nucleus II software was used to analyze the spectra. It was observed that the mass attenuation coefficient decreases with increasing energy and increases with increasing atomic number.