Abstract
Lead borate glass and unglazed ceramic composites have been investigated as shielding against gamma rays and thermal neutron. Attenuation parameters, mass attenuation coefficient and half-value layer using a wide range of gamma-rays energies 356, 511, 662, 1173, 1274 and 1332 keV, were determined. Transmitted gamma rays were measured by NaI(Tl) scintillation detector. Mass attenuation coefficients of the prepared composites samples have been measured experimentally and compared theoretically by XCOM, reasonable agreement has been observed. Also, the attenuation of the transmitted collimated thermal neutrons emitted from Californium-252 neutron source was measured using BF3 detector. The measured macroscopic cross-section of transmitted thermal neutron indicated that composites Lead borate glass and unglazed ceramic with the highest percentage of Boron and Barium, respectively are more effective than lower percentages as a thermal neutrons shield. The measured and calculated mass attenuation coefficient for gamma rays indicated that Lead borate glass and unglazed ceramic composites with the highest percentage of Lead are more effective than lower percentage against gamma-rays.
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