Structural, optical properties and γ - ray shielding parameters of PbO embedded Li2O borophosphate glass systems

2020 ◽  
Vol 543 ◽  
pp. 120135 ◽  
Author(s):  
Mohsen H. Abdel-Wahed ◽  
Saleh M. Abdou ◽  
A.S. El-Bayoumi ◽  
S.M. Salem ◽  
A.A. Bendary
Keyword(s):  
Optical Properties ◽  
Borophosphate Glass ◽  
Γ Ray

Structural studies and optical properties of pearl nucleus irradiated by γ-ray

2013 ◽  
Vol 168 (9) ◽  
pp. 696-704
Author(s):  
Hea-Yeon Kim ◽  
Younes Hanifehpour ◽  
Arghya Narayan Banerjee ◽  
Bong-Ki Min ◽  
Sang Woo Joo ◽  
...  
Keyword(s):  
Optical Properties ◽  
Structural Studies ◽  
Γ Ray

Influence of Bi2O3 on Borophosphate Glasses Properties

2014 ◽  
Vol 979 ◽  
pp. 343-346 ◽  
Author(s):  
Natthakridta Chanthima ◽  
Jakrapong Kaewkhao
Keyword(s):  
Optical Properties ◽  
Molar Volume ◽  
Absorption Spectra ◽  
Packing Density ◽  
Visible Range ◽  
Melt Quenching ◽  
Borophosphate Glasses ◽  
Borophosphate Glass ◽  
Uv Visible

Borophosphate glasses have been synthesized with a Bi2O3concentration of 15.0 to 25.0 mol%, added 2.5 mol% for each concentration, by the normal melt quenching technique at 1200 °C. The physical and optical properties of bismuth borophosphate glass systems have been studied. The glasses are characterized for their physical and optical properties. The density and molar volume of these glasses were found in the range 3.4391 to 3.9338 g/cm3and 52.2515 to 55.7557 cm3/mol, respectively. It was observed that the density and molar volume of these glasses was increased with increasing the concentration of Bi2O3. The absorption spectra of these glasses were recorded in the UV-Visible range. It has been found that, the absorption spectra were shifted to longer wavelength with higher Bi2O3concentration. In addition, the oxygen packing density of glass samples have been also investigated.

Effect of Buffer on the Optical Properties of Irradiated Hydroxyethyl Methacrylate Copolymer

2002 ◽  
Vol 17 (5) ◽  
pp. 1199-1207
Author(s):  
K. F. Chou ◽  
C. C. Han ◽  
Sanboh Lee
Keyword(s):  
Optical Properties ◽  
Irradiation Dose ◽  
Ph Value ◽  
Bathochromic Shift ◽  
Cutoff Wavelength ◽  
Hydroxyethyl Methacrylate ◽  
Γ Irradiation ◽  
Incident Wavelength ◽  
Γ Ray ◽  
Methacrylate Copolymer

The effect of buffer and γ irradiation on the optical properties of hydroxyethyl methacrylate (HEMA) copolymer was investigated. The transmission of HEMA copolymer decreased with the increase of irradiation dose and/or pH value of the buffer. The cutoff wavelength of HEMA copolymer exhibits a bathochromic shift as the γ-ray dose and/or pH value of buffer increases. The influence of atmosphere during γ-ray irradiation on the optical properties of HEMA copolymer was investigated. The change of optical properties of HEMA copolymer irradiated in air was more pronounced than that irradiated in vacuum. Light was scattered by holes in the polymer. The relationship between scattering intensity (Is) and incident wavelength (λ) can be described by the formula Is ∝ λ−n. The span of holes increases with the irradiation dose regardless of radiation atmosphere and pH value in the range of 4.1–6.5. A boundary between the inner and outer layers of HEMA copolymer irradiated in air was observed, separating two differential morphologies of holes.

Structural and optical properties of γ-ray irradiated TiO2 single crystals

2020 ◽  
Vol 101 ◽  
pp. 109748
Author(s):  
Huan Liu ◽  
Gongping Li ◽  
Dejun E ◽  
Nannan Xu ◽  
Qiaolu Lin ◽  
...  
Keyword(s):  
Optical Properties ◽  
Single Crystals ◽  
Structural And Optical Properties ◽  
Γ Ray

Changes in structural and optical properties due to γ-irradiation of MgO nanoparticles

2020 ◽  
Vol 108 (4) ◽  
pp. 315-320
Author(s):  
Maryam Amini ◽  
Mohammad Hossein Majles Ara
Keyword(s):  
Optical Properties ◽  
Dose Rate ◽  
Structural Properties ◽  
Gamma Spectroscopy ◽  
Hexagonal Lattice ◽  
Crystal Defects ◽  
Γ Irradiation ◽  
Mgo Nanoparticles ◽  
Before And After ◽  
Γ Ray

AbstractIn this research, the influence of γ-irradiation on the optical and structural properties of magnesium oxide (MgO) nanoparticles was studied. The MgO nanoparticles were irradiated with doses 100 Gy, 1 kGy, 10 kGy and 20 kGy from 60Co source. The as-synthesized samples of MgO nanoparticles prepared by the sol-gel technique were analyzed by XRD which suggested the double phase; cubic and hexagonal structures of the material. The crystal defects that produced in the cubic and hexagonal lattice were studied before and after 60Co γ-irradiation in a gamma cell by different dose rates in order to report the changes in structural properties of the MgO nanoparticles. The irradiated and un-irradiated samples were characterized by XRD and UV–Vis. The XRD pattern of MgO nanoparticles is showed that the crystal size of MgO nanoparticles being increased with increasing the γ-ray dose rate. For optical absorption, the UV–Visible absorption spectra of MgO nanoparticles are showed that when the dose rate is increased, the value of band gap is decreased. Also, the experimental values of the mass attenuation coefficient of MgO nanoparticles have been calculated before and after γ-irradiation by using the gamma spectroscopy method. Therefore, the results are showed that γ-ray irradiation has various effects on structural, morphological and optical properties.

The Effect of γ-Ray Irradiation on Optical Properties of Single Photon Sources in 4H-SiC MOSFET

2020 ◽  
Vol 1004 ◽  
pp. 361-366
Author(s):  
Yuta Abe ◽  
Takahide Umeda ◽  
Mitsuo Okamoto ◽  
Shinsuke Harada ◽  
Yuichi Yamazaki ◽  
...  
Keyword(s):  
Optical Properties ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Single Photon ◽  
Hydrogen Atoms ◽  
Oxide Semiconductors ◽  
Interface Defects ◽  
Mobile Hydrogen ◽  
Photon Sources ◽  
Γ Ray

We investigated the effects of γ-ray irradiation to single photon sources (SPSs) embedded in 4H-SiC metal-oxide-semiconductors field-effect transistors (MOSFETs). After the γ-ray irradiation, the number of SPSs was temporarily increased. However, the ratio of unstable SPSs was increased with increasing the radiation dose, and such unstable ones gradually disappeared. Finally, the density of the SPSs nearly recovered that before the irradiation. We discuss a possible explanation on these phenomena in terms of interactions between mobile hydrogen atoms and interface defects.

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