Abstract
The direct effect of BaO addition on the optical basicity (^
th
) , electronegativity (
χ
av
), electronic polarizability (
α
0
-
2
), the linear/nonlinear optical properties, and the γ-radiation and neutron shielding competencies was evaluated for glasses described by a chemical formula of 50P
2
O
5
+ 30TiO
2
+ (20-x) K
2
O + xBaO; x varies between 0 and 20 mol%. The (^
th
) was decreased from 0.780 to 0.730; the (
α
0
-
2
) was decreased from 1.88 to 1.78, and (
χ
av
) was enhanced from 2.31 to 2.38 when the BaO varied between 0 and 20 mol%. The optical energy gap (
E
g
) was increased from 3.19 to 3.49 eV for the indirect transition, while from 3.40 to 3.69 eV for direct transition. The highest mass attenuation coefficient changes between 12.198, 14.781, 17.238, 19.579, and 21.806 cm
2
/g at a gamma photon energy of 0.015 MeV, while the lowest mass attenuation coefficient varied between 0.022, 0.0235, 0.0246, 0.0256, and 0.0266 cm
2
/g, achieved at a gamma photon energy of 15 MeV when the BaO insertion concentration increases from 0 to 20 mol%. Regarding the shielding parameters, they are enhanced gradually along with the studied gamma spectrum energy with increasing the replacement of K
2
O by BaO compound. The total fast neutron total effective removal cross-section ∑
R
(cm
2
/g) was reduced in the order between 0.03248 and 0.02916 cm
2
/g with raising the BaO insertion ratio between 0, 5, 10, 15, and 20 mol%.