Synthesis and thermoluminescence characterization of lithium tetraborate (Li2B4O7) doped with copper and silver metals

Yılmaz, Ayşen
In this paper, dosimetric phosphor; lithium tetraborate (Li2B4O7) which has been synthesized and doped with Cu, Ag transition metals using two different synthesis methods (solution-assisted method and microwave-assisted method) and thermoluminescence characteristics of synthesized lithium tetraborate are analyzed. Synthesized Li2B4O7: Cu and Li2B4O7: Cu, Ag phosphors were characterized with X-ray Diffraction, Transmission Electron Microscopy, Scanning Electron Microscopy, and Differential Thermal Analysis to determine structural and morphological properties. Thermoluminescence (TL) properties of the lithium tetraborate samples, doped with varied amounts of copper in the range 0.02 wt%- 0.1 wt% and constant amount of silver (0.04 wt%) was added as co-dopant, were studied. it results demonstrate that 0.08% Cu and 0.04% Ag doped lithium tetraborate synthesized with solution-assisted method has the highest dosimetric sensitivity. Kinetic parameters (trap depth and order of kinetic) of this sample were calculated using peak shape, variable heating rate and computer glow curve deconvolution methods.


Cetin, Barbaros; Bayer, Özgür (National Library of Serbia, 2011-01-01)
In this paper. the fully-developed temperature profile and corresponding Nusselt value is determined analytically for a gaseous flow in a microtube with a thermal boundary condition of constant wall heat flux. The flow assumed to be laminar, and hydrodynamically and thermally fully developed. The fluid is assumed to be constant property and incompressible. The effect of rarefaction, viscous dissipation and axial conduction, which are important at the microscale, are included in the analysis. Second-order sl...
Comparison of Efficiency of Two dc-to-ac Converters for Grid Connected Solar Applications
Ertan, Hulusi Bülent; Yilmaz, Arif (2012-05-26)
In this paper; requirements from grid connected photovoltaic (PV) converters are briefly reviewed. Traditional buck-converter, line-frequency transformer topology is taken as reference, which satisfies all of the requirements imposed by standards and the utility. However, this topology employs a bulky transformer. Furthermore, a large electrolytic capacitor is needed in this circuit, which is expensive and also limits the life of the converter. This is not desirable in modern applications where PV module st...
Transport and mechanical properties of self consolidating concrete with high volume fly ash
Sahmaran, Mustafa; Yaman, İsmail Özgür; Tokyay, Mustafa (2009-02-01)
This paper presents the transport. and mechanical properties of self consolidating concrete that contain high percentages of low-lime and high-lime fly ash (FA). Self consolidating concretes (SCC) containing five different contents of high-lime FA and low-lime FA as a replacement of cement (30, 40, 50, 60 and 70 by weight of total cementitious material) are examined. For comparison, a control SCC mixture without any FA was also produced. The fresh properties of the SCCs were observed through, slump flow tim...
Analysis of the Junction Properties of C/GaSe<sub>0.5</sub>S<sub>0.5</sub>/C Back-to-Back Schottky-Type Photodetectors
Khanfar, Hazem K.; Qasrawi, Atef F.; Hasanlı, Nızamı (Institute of Electrical and Electronics Engineers (IEEE), 2015-4)
In this paper, a C/GaSe0.5S0.5/C metal-semiconductor-metal photodetector is suggested and described. The device is explored by means of current-voltage and capacitance-voltage (C-V) characteristics under different photoexcitation intensities. It was observed that the design of the back-to-back Schottky device has reduced the dark current of the normal Ag/GaSe0.5S0.5/C Schottky diode by 13 times and increased the photosensitivity from 3.8 to similar to 2.1x10(3). The device exhibited a barrier height of 0.84...
The thermoluminescent properties of lithium triborate (LiB3O5) activated by aluminium
Depci, Tolga; Yılmaz, Ayşen; Yılmaz, Ayşen; YAZICI, AHMET NECMEDDİN (2008-03-01)
In this paper, the thermoluminescence (TL) dosimetric characteristics of Al-doped LiB3O5 compounds are presented. The powder samples were prepared by the solid-state reaction method and the formation of the compounds were confirmed by an X-ray diffraction study. The TL studies of undoped and Al-doped LiB3O5 samples showed similar glow curve structures. They have three TL glow peaks at about 60, 130 and 200 degrees C after heating at a constant heating rate of 1 degrees C/s. Their comparative TL studies indi...
Citation Formats
M. ÇELİK, A. Yılmaz, and A. N. YAZICI, “Synthesis and thermoluminescence characterization of lithium tetraborate (Li2B4O7) doped with copper and silver metals,” RADIATION MEASUREMENTS, pp. 16–26, 2017, Accessed: 00, 2020. [Online]. Available: