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

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

Reentrant Structural and Optical Properties of Organic–Inorganic Hybrid Metal Cluster Compound ((n-C4H9)4N)2[Mo6Bri8Bra6]

CrystEngComm ◽  
2022 ◽  
Author(s):  
Norio Saito ◽  
Daiki Nishiyama ◽  
Yoshitaka Matsushita ◽  
Yoshiki Wada ◽  
Stéphane Cordier ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Monoclinic Phase ◽  
Metal Cluster ◽  
Cluster Compound ◽  
Structural Studies ◽  
Structural And Optical Properties ◽  
Inorganic Hybrid

We report the reentrant phase transition of the organic–inorganic hybrid metal cluster (MC) compound (TBA)2[Mo6Bri8Bra6] (TBA = ((n-C4H9)4N)). Structural studies revealed that (TBA)2[Mo6Bri8Bra6] was crystallized in the conventional monoclinic phase...

Structural and Optical Properties of Zn Doped CdTe Thin Films by Stacked Elemental Layer Method

2011 ◽  
Vol 383-390 ◽  
pp. 3279-3285
Author(s):  
S. Shanmugan ◽  
D. Mutharasu ◽  
Kamarulazizi Ibrahim
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Structural Studies ◽  
Structural And Optical Properties ◽  
Transmittance Spectra ◽  
X Ray ◽  
Standard Data ◽  
Layer Method ◽  
Cdte Thin Films ◽  
Elemental Layer

25% Zinc doped Cadmium Telluride thin films were prepared using Stacked Elemental Layer method. The structural studies were conducted by the X-Ray technique and the results were compared with standard data which confirmed the presence of mixed phases (CdTe, ZnTe and CdZnTe) in the stack annealed at 425°C. Transmittance spectra depicted the effect of Zn on the optical properties of CdTe thin film. The calculated band gaps from the transmittance spectra were lie between 1.42 and 1.51eV. Scanning Electron Microscope images elucidated the influence of Zn on surface morphology and the grain growth for CdTe thin films.

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.

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