scholarly journals Radiation-induced Luminescence Properties of SrBr2 Transparent Ceramics Doped with Different Eu Concentrations

2020 ◽  
Vol 32 (4) ◽  
pp. 1381 ◽  
Author(s):  
Hiromi Kimura ◽  
Takumi Kato ◽  
Daisuke Nakauchi ◽  
Noriaki Kawaguchi ◽  
Takayuki Yanagida
Keyword(s):  
Luminescence Properties ◽  
Transparent Ceramics ◽  
Radiation Induced

Luminescence properties of Eu 3+ -doped Lanthanum gadolinium hafnates transparent ceramics

2017 ◽  
Vol 71 ◽  
pp. 5-8 ◽  
Author(s):  
Zhengjuan Wang ◽  
Guohong Zhou ◽  
Jian Zhang ◽  
Xianpeng Qin ◽  
Shiwei Wang
Keyword(s):  
Luminescence Properties ◽  
Transparent Ceramics

scholarly journals The Effect of Ionising Radiation on the Luminescence Properties of Fluoroperovskites

2021 ◽  
Author(s):  
◽  
Joseph Schuyt
Keyword(s):  
Energy Levels ◽  
Thermal Quenching ◽  
Ionising Radiation ◽  
Luminescence Properties ◽  
Readout System ◽  
Tissue Equivalent ◽  
Potential Applications ◽  
Radiation Induced ◽  
Medical Dosimetry ◽  
Physical Phenomena

<p>The luminescence of crystalline compounds can be used to monitor many physical phenomena, including doses of ionising radiation. Optically stimulated luminescence (OSL), thermoluminescence (TL), and radiophotoluminescence (RPL) have been successfully employed in dosimetry. However, few materials possess both the structural and luminescence properties required for medical dosimetry. This thesis aimed to investigate the luminescence features of the class of compounds known as fluoroperovskites. Emphasis was placed on studying the effects of irradiation on the luminescence properties, such that the compounds could be evaluated regarding potential applications in clinical dosimetry. Samples were primarily characterised using photoluminescence (PL), radioluminescence (RL), OSL, RPL, TL, and transmittance spectroscopy.  OSL was observed in the majority of samples due to the existence of electron trapping F-type centres. F-centre/Mn complexes were observed in all AMgF3:Mn compounds after irradiation and the energy levels of the complexes in each compound were experimentally determined. The most promising potential dosimeter host material was the near tissue-equivalent NaMgF3. When doped with Mn2+, the compound exhibited RPL via the formation of F-centre/Mn complexes and OSL via several trapping centres. The RPL could be probed independently to the OSL such that the compound could function as a hybrid OSL/RPL dosimeter. In the NaMgF3:Ln compounds, RPL occurred via the radiation-induced reduction Ln3+ → Ln2+ for Ln = Sm, Dy, and Yb. The reduction Sm3+ → Sm2+ was highly stable and could be non-destructively probed independently to the OSL. The Sm doped compound also exhibited radiation-induced conductivity that could be coupled with the RL, such that the compound could function as a real-time hybrid optical/electrical dosimeter. Charge kinetics, thermal quenching, and binding energy models were developed and applied to the compounds.   Finally, a two-dimensional readout system was designed and constructed. The capabilities of the system were evaluated using the OSL of NaMgF3:Eu and NaMgF3:Mn. Sensitivities to doses from < 10 mGy to > 1 Gy were obtained along with sub-millimetre spatial resolutions.</p>

Bi3+-Sensitized La2Zr2O7:Er3+ Transparent Ceramics with Efficient Up/Down-Conversion Luminescence Properties for Photonic Applications

2019 ◽  
Vol 124 (1) ◽  
pp. 913-920 ◽  
Author(s):  
Dan Ruan ◽  
Zhangyi Huang ◽  
Zhe Tang ◽  
Yutong Zhang ◽  
Xiuling Wang ◽  
...  
Keyword(s):  
Luminescence Properties ◽  
Transparent Ceramics ◽  
Down Conversion

Luminescence properties of transparent ceramics Y3Al5O12:Yb

2010 ◽  
Vol 109 (6) ◽  
pp. 887-892 ◽  
Author(s):  
M. M. Chugunova ◽  
I. A. Kamenskikh ◽  
V. V. Mikhailin ◽  
S. A. Usenko
Keyword(s):  
Luminescence Properties ◽  
Transparent Ceramics

Radiation induced modifications on structural and luminescence properties of LDPE–Na2SO4:Sm3+ composites by γ-ray

2015 ◽  
Vol 42 ◽  
pp. 251-255 ◽  
Author(s):  
Jing Zhang ◽  
Abu Zayed Mohammad Saliqur Rahman ◽  
Yuxiao Li ◽  
Jing Yang ◽  
Yaru Wu ◽  
...  
Keyword(s):  
Luminescence Properties ◽  
Radiation Induced ◽  
Γ Ray

scholarly journals The Effect of Ionising Radiation on the Luminescence Properties of Fluoroperovskites

2021 ◽  
Author(s):  
◽  
Joseph Schuyt
Keyword(s):  
Energy Levels ◽  
Thermal Quenching ◽  
Ionising Radiation ◽  
Luminescence Properties ◽  
Readout System ◽  
Tissue Equivalent ◽  
Potential Applications ◽  
Radiation Induced ◽  
Medical Dosimetry ◽  
Physical Phenomena

<p>The luminescence of crystalline compounds can be used to monitor many physical phenomena, including doses of ionising radiation. Optically stimulated luminescence (OSL), thermoluminescence (TL), and radiophotoluminescence (RPL) have been successfully employed in dosimetry. However, few materials possess both the structural and luminescence properties required for medical dosimetry. This thesis aimed to investigate the luminescence features of the class of compounds known as fluoroperovskites. Emphasis was placed on studying the effects of irradiation on the luminescence properties, such that the compounds could be evaluated regarding potential applications in clinical dosimetry. Samples were primarily characterised using photoluminescence (PL), radioluminescence (RL), OSL, RPL, TL, and transmittance spectroscopy.  OSL was observed in the majority of samples due to the existence of electron trapping F-type centres. F-centre/Mn complexes were observed in all AMgF3:Mn compounds after irradiation and the energy levels of the complexes in each compound were experimentally determined. The most promising potential dosimeter host material was the near tissue-equivalent NaMgF3. When doped with Mn2+, the compound exhibited RPL via the formation of F-centre/Mn complexes and OSL via several trapping centres. The RPL could be probed independently to the OSL such that the compound could function as a hybrid OSL/RPL dosimeter. In the NaMgF3:Ln compounds, RPL occurred via the radiation-induced reduction Ln3+ → Ln2+ for Ln = Sm, Dy, and Yb. The reduction Sm3+ → Sm2+ was highly stable and could be non-destructively probed independently to the OSL. The Sm doped compound also exhibited radiation-induced conductivity that could be coupled with the RL, such that the compound could function as a real-time hybrid optical/electrical dosimeter. Charge kinetics, thermal quenching, and binding energy models were developed and applied to the compounds.   Finally, a two-dimensional readout system was designed and constructed. The capabilities of the system were evaluated using the OSL of NaMgF3:Eu and NaMgF3:Mn. Sensitivities to doses from < 10 mGy to > 1 Gy were obtained along with sub-millimetre spatial resolutions.</p>

Comparative study of radiation-induced luminescence properties in Eu:SrAl2O4 translucent ceramic and single crystal

2019 ◽  
Vol 126 ◽  
pp. 106127
Author(s):  
Daisuke Nakauchi ◽  
Fumiya Nakamura ◽  
Go Okada ◽  
Hiromi Kimura ◽  
Noriaki Kawaguchi ◽  
...  
Keyword(s):  
Comparative Study ◽  
Single Crystal ◽  
Luminescence Properties ◽  
Radiation Induced

Radiation induced luminescence properties of Ce-doped Y2O3-Al2O3-SiO2 glass prepared using floating zone furnace

2019 ◽  
Vol 782 ◽  
pp. 859-864 ◽  
Author(s):  
Yuya Isokawa ◽  
Daisuke Nakauchi ◽  
Go Okada ◽  
Noriaki Kawaguchi ◽  
Takayuki Yanagida
Keyword(s):  
Luminescence Properties ◽  
Floating Zone ◽  
Sio2 Glass ◽  
Radiation Induced
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