Yazar "Almutairi, Haifa M." seçeneğine göre listele

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    Comprehensive study of optical, thermal, and gamma-ray shielding properties of B2O3-SiO2-BeO- MgO-La2O3, glasses
    (Elsevier, 2024) Alsafi, Khalid; Aloraini, Dalal Abdullah; Almutairi, Haifa M.; Issa, Shams A. M.; Zakaly, Hesham M. H.; Shaaban, Kh S.
    The purpose of this work is to study the thermal, optical, structural, and radiation-shielding features of glass system with composition 57B2O3-16SiO2-11BeO- (16-x) MgO-xLa2O3, x = (0 <= x >= 16). The structural characteristics of glass samples are examined using XRD. This glass's molar volume decreased from 18.21 to 17.46 (cm3/mol), while its density increased from 3.213 to 5.967 g/cm3. Differential thermal analysis data were used to assess the thermal stability (Delta T) for BSLa samples. It was discovered that when the La2O3 amount increased, the glass stability increased. The optical band gap (Ediopt), (Eindi opt ) and Urbach's energy (Eu) were computed using UV absorption spectra. (Ediopt) decrease from 4.323 to 3.816 eV and (Eindiopt) decrease from 3.413 to 2.95 eV, whereas (Eu) increase from 0.278 to 0.324 as a result of the changes of borosilicate's structured caused by the addition of La2O3. The examined glasses may be utilized for non -linear optical applications, according to the high (n) and low metallization (M) values. The Phy-X tool was utilized to obtain (MAC), (LAC), and (Zeff) of the suggested glasses within the energies 0.015-15 MeV. The BSLa16 sample achieved the highest values of the (MAC), (LAC), and (Zeff). Consequently, BSLa16 is a good option for gamma-ray shielding applications.
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    Y 2 O 3 reinforced B 2 O 3-SiO 2-BaO-Na 2 O glass system: A characterization study through physical, optical and gamma / neutron shields characteristics
    (Elsevier, 2024) Alsafi, Khalid; Zakaly, Hesham M. H.; Aloraini, Dalal Abdullah; Al-Saleh, Wafa M.; Almutairi, Haifa M.; Issa, Shams A. M.; Shaaban, Kh S.
    Glasses with the composition 48B 2 O 3 - 13SiO 2 - 7BaO- (32-x) Na 2 O-xY 2 O 3 , (x = 0, 1, 2, 4, and 8 mol %) were synthesized by the melt quenching procedure. There is good transparency in every glass sample. The increase in density (2.825-3.894 gm/cm 3 ) of the present glasses is what triggered the decline in molar volume (25.41-21.80 cm 3 /mol) and the decrease in the Boron-Boron distance (0.475-0.452 nm). The estimated values show that E indi . opt . & E di opt . are 2.317, 2.672, 2.8, 2.98 and 3.1 eV, 2.69, 2.92, 3.05, 3.25, and 3.44 eV respectively, whereas (E u ) values declined. As the Y 2 O 3 increased the refractive index ( n D ) increased. ( n D ) of the synthesized glasses using E indi . opt . & E di opt . were estimated. To find the radiation properties of the suggested glasses, the Phy-X/PSD code was employed. We concluded that the current glasses have better radiation shielding capabilities when employed in such fields. As the Y 2 O 3 replacing ratio increased & sum; R increased.