Assessment of the usability conditions of Sb 2O 3–PbO–B 2O 3 glasses for shielding purposes in some medical radioisotope and a wide gamma- ray energy spectrum
Özet
We report some fundamental gamma-ray shielding
properties and individual transmission factors (TFs) of five
distinct glass samples with a nominal composition of
xSb2O3·(40 − x)PbO·60B2O3·0.5CuO and (where; 0 ≤ x ≤
40 mol%). Phy-X/PSD and MCNPX (version 2.7.0) Monte
Carlo code are utilized to determine several critical para-
meters, such as cross-sections, attenuation coefficients,
half and tenth value layers, build-up factors, and TFs. A
general transmission setup is designed using basic require-
ments. Accordingly, TFs are evaluated for several medical
radioisotopes. Next, the gamma-ray shielding parameters
and TFs are assessed together in terms of providing the
validity of the findings. Our results showed that there is a
positive contribution of increasing Sb2O3 amount in the
glass matrix owing its direct effect to the density increment
as well. This positive effect on gamma-ray shielding proper-
ties is also observed for decreasing mean free path values
from S1 to S5 samples. The exposure build-up factor (EBF)
and energy absorption build-up factor (EABF) values,
increasing the quantity of Sb2O3 supplementation, resulted
in a general reduction in EBF and EABF values (i.e., from
0.5 to 40 mfp). When the quantity of Sb2O3 rises from S1 to
S5, the collision rate of incoming gamma rays in glass samples
increases significantly. The TF figures reveal that S5 showed
the least transmission behavior across all the above-men-
tioned studied glass thicknesses. It can be concluded that
increasing the Sb2O3 additive is a beneficial and monotonic
technique, when the gamma-ray shielding qualities or TF
values must be further enhanced.
