Abstract
This work deals with the application of [MERCSF-N] computer program in calculating the macroscopic effective removal cross-section of fast neutrons, ΣR (cm－1), for two different boro phosphate glass systems: (0.5 - x) CdO-x Fe2O3-0.4 P2O5-0.1 B2O3 and (0.5 - x) B2O3-x Fe2O3-0.1 CdO-0.4 P2O5 (with 0.05 ≤ x ≤ 0.5 by mole), to realize from the role of iron in the attenuation process and hence the usefulness of the glass containing iron as neutrons shielding material. The effect of replacing cadmium and boron oxides by iron oxide has been analyzed which proved that iron is more efficient than cadmium in attenuating and removing fast neutrons and that the presence of small amounts of B2O3 at least 0.1 mole fraction, with iron is needed to aid improving the removal cross-section of iron phosphate glasses. Experimental IR results are developed and used to trace the structural change and confirm the role of iron in the removal cross section.
Highlights
Phosphate glasses are technologically important materials because they generally have high thermal expansion coefficients, low transition temperatures and low preparation temperatures [1,2]
This work deals with the application of [MERCSF-N] computer program in calculating the macroscopic effective removal cross-section of fast neutrons, ΣR, for two different boro phosphate glass systems: (0.5 - x) CdO-x Fe2O3-0.4 P2O5-0.1 B2O3 and (0.5 - x) B2O3-x Fe2O3-0.1 CdO-0.4 P2O5, to realize from the role of iron in the attenuation process and the usefulness of the glass containing iron as neutrons shielding material
The effect of replacing cadmium and boron oxides by iron oxide has been analyzed which proved that iron is more efficient than cadmium in attenuating and removing fast neutrons and that the presence of small amounts of B2O3 at least 0.1 mole fraction, with iron is needed to aid improving the removal cross-section of iron phosphate glasses
Summary
Phosphate glasses are technologically important materials because they generally have high thermal expansion coefficients, low transition temperatures and low preparation temperatures [1,2]. These properties have made them ideal materials for fundamental studies. Addition of different types of metal oxides like Fe2O3, to binary phosphate glasses [3,4] has been found to improve the chemical durability and the attenuation of fast neutron [5,6]. Since all interacttions tend to remove energy from the fast neutron beam, so as a result ΣR value is not too different from the total (scattering and capture) macroscopic cross-section ΣT (ΣT = NσnT) of the material, but is generally lower [8]
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