Ionising Radiation Induced Effects on Bismuth/Erbium Co-Doped Optical Fibres

2018 ◽  
Author(s):  
Yanhua Luo ◽  
Gui Xiao ◽  
Qiancheng Zhao ◽  
Andrei Stancalie ◽  
Daniel Ighigeanu ◽  
...  
Keyword(s):  
Ionising Radiation ◽  
Optical Fibres ◽  
Radiation Induced ◽  
Co Doped

Radiation-induced loss and colour-centre concentration in optical fibres

1983 ◽  
Vol 19 (1) ◽  
pp. 11 ◽  
Author(s):  
H. Yashima ◽  
H. Mitera ◽  
Y. Itoh
Keyword(s):  
Optical Fibres ◽  
Colour Centre ◽  
Radiation Induced

Reversible photo-bleaching of radiation-induced losses in optical fibres

1979 ◽  
Vol 11 (5) ◽  
pp. 467-469 ◽  
Author(s):  
E. M. Dianov ◽  
E. P. Nikitin ◽  
L. S. Kornienko ◽  
A. O. Rybaltovsky ◽  
P. V. Chernov
Keyword(s):  
Optical Fibres ◽  
Radiation Induced

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>

Radiation-induced enhancement of jasmonic acid levels

1994 ◽  
Vol 102 ◽  
pp. 303-306
Author(s):  
H. Sprinz ◽  
C. von Sonntag ◽  
U. Franck ◽  
O. Miersch ◽  
H. Dahlhelm
Keyword(s):  
Jasmonic Acid ◽  
Plant Hormone ◽  
Positive Stimulus ◽  
Ionising Radiation ◽  
Physiological Effects ◽  
Low Doses ◽  
Metabolic Processes ◽  
Radiation Induced ◽  
Response To Stress

In recent years, some experiments with low doses of ionising radiation have been performed, with reproducible results, which indicate a positive stimulus rather than a deletirious effect (Decker & Degner 1983; Wolff 1989).The aim of our own studies was to establish whether low doses of ionising radiation can influence metabolism by means of a modification of the concentration of a plant hormone, in this particular case jasmonate. The multiple physiological effects caused by the plant bioregulator jasmonate, including response to stress, suggest their essential involvement in central genetic and metabolic processes (Sembdner & Parthier 1993).

Sensitivity and latency of ionising radiation-induced cataract

2021 ◽  
pp. 108772
Author(s):  
Elizabeth A. Ainsbury ◽  
StephenG.R. Barnard
Keyword(s):  
Ionising Radiation ◽  
Radiation Induced

Drawing condition dependence of radiation-induced loss in optical fibres

1986 ◽  
Vol 22 (2) ◽  
pp. 106 ◽  
Author(s):  
H. Hanafusa ◽  
Y. Hibino ◽  
F. Yamamoto
Keyword(s):  
Condition Dependence ◽  
Optical Fibres ◽  
Radiation Induced
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