The Thermoluminescence Performance of Ge- Doped Optical Fibres To 6 Mv Photon Irradiations

2014 ◽  
Vol 71 (5) ◽  
Author(s):  
E.I.M.K. Ariffin ◽  
F. Sallih ◽  
S. Hashim ◽  
S. Zakariah ◽  
M.I.C Pi
Keyword(s):  
Optical Fibre ◽  
Dose Response ◽  
Linear Accelerator ◽  
Radiation Dosimetry ◽  
Low Dose ◽  
Optical Fibres ◽  
Photon Irradiation ◽  
Linear Dose ◽  
Different Diameters

The study focus on thermoluminescence (TL) response of five different diameters ~120, 241, 362, 483 and 604 μm of 8 mol% Ge-doped optical fibres. The irradiation was performed using Linear Accelerator (LINAC) Model Primus MLC Siemens provided by the Hospital Sultan Ismail, Johor Bahru at 6 MV photon irradiation with delivered doses ranging from 0.5 – 4.0 Gy. The results show the linear dose response against TL signals up to 4 Gy. The diameter of 483 μm optical fibre shows the highest in TL dose response and sensitivity compared to other fibres. The sensitivity of 483 µm optical fibre are almost 1.6 times  more than 604 µm. The linear dose response at low dose makes this optical fibre suitable to be used in radiation dosimetry application.

Optical fibre radiation dosimetry for low dose applications

2010 ◽  
Author(s):  
D McCarthy ◽  
S O'Keeffe ◽  
G Leen ◽  
E Lewis
Keyword(s):  
Optical Fibre ◽  
Radiation Dosimetry ◽  
Low Dose

The Thermoluminescence Response of Dy Doped Calcium Borate Glass Subjected to 6MV Photon Irradiation

2014 ◽  
Vol 895 ◽  
pp. 390-394 ◽  
Author(s):  
Hamiza Ahmad Tajuddin ◽  
Husin Wagiran ◽  
Rosli Hussin
Keyword(s):  
Dose Response ◽  
Borate Glass ◽  
Glass Sample ◽  
Dopant Concentration ◽  
Response Relationship ◽  
Dose Response Relationship ◽  
Melt Quenching ◽  
Photon Irradiation ◽  
Linear Dose ◽  
Quenching Method

This paper presents the thermoluminescence (TL) response and sensitivity of various dopant concentration of Dy into borate glass. Borates glass present absorption coefficient that closely to human bone and teeth. This fact makes borate as an ideal material for TL material either for medical or environmental dosimeter. Therefore, a series of glasses based on xCaO-(100-x)B2O3system (0 x 100) % weight has been prepared by using melt quenching method. In this research, Dy doped (0.01-0.4) mol% to 30CaO-70B2O3glass sample were studied to investigate the TL properties in terms of dose-response relationship and sensitivity. Samples were irradiated to various doses range 0.5-4.0 Gy subjected to 6 MV photon irradiation by using LINAC Primus MLC 3339. The TL intensity of various dopant concentration were studied and it was founds that the 0.3 mol% Dy has the highest TL response and has linear dose response relationship. The highest sensitivity was calculated as 58 nC.mg-1.Gy-1for 0.3 mol% Dy concentration.

Low-dose photon irradiation response of Ge and Al-doped SiO2 optical fibres

2011 ◽  
Vol 69 (9) ◽  
pp. 1189-1192 ◽  
Author(s):  
Nor H. Yaakob ◽  
Husin Wagiran ◽  
Md. Imam Hossain ◽  
Ahmad T. Ramli ◽  
D.A. Bradley ◽  
...  
Keyword(s):  
Low Dose ◽  
Optical Fibres ◽  
Photon Irradiation

scholarly journals Effect of Radiation on Germanium Doped SiO2 Fibres

2021 ◽  
pp. 12-17
Author(s):  
I. Hossain ◽  
A. N. H. Yaakob ◽  
H. Wagiran
Keyword(s):  
Electron Irradiation ◽  
Comparative Studies ◽  
Linear Accelerator ◽  
Electron Beams ◽  
Average Intensity ◽  
Optical Fibres ◽  
Multileaf Collimator ◽  
Comparative Effect ◽  
Linear Accelerators ◽  
Photon Irradiation

We report comparative effect of radiation on Germanium incapacitated Optical fibres and commercially available TLD-100. The experiments were carried out using Siemens linear accelerator (LINAC) Primus Multileaf Collimator (MLC) 3339 to deliver photon and electron beams. The Harshaw model 3500 TLD reader with WinREMS software were used in this experiment. Both media were irradiated with 6 x106 eV electrons and 6 x106 volts photons beam. We found a good linearity for TL dose in the range from 20 to 240 mGy. Comparative studies of these compounds indicate that the TL responses using photon and electron irradiation are similar and the average intensity is enhanced by about 1.30 times in electrons than those for photon irradiation. The information of the mini review report of this paper presents in valuable for clinical linear accelerators applications.

scholarly journals Non-linear dose-response of aluminium hydroxide adjuvant particles: Selective low dose neurotoxicity

Toxicology ◽  
2017 ◽  
Vol 375 ◽  
pp. 48-57 ◽  
Author(s):  
Guillemette Crépeaux ◽  
Housam Eidi ◽  
Marie-Odile David ◽  
Yasmine Baba-Amer ◽  
Eleni Tzavara ◽  
...  
Keyword(s):  
Dose Response ◽  
Aluminium Hydroxide ◽  
Low Dose ◽  
Linear Dose ◽  
Non Linear
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