Thermoluminescence properties of fluorescent materials used in commercial lamps

Bulur, Enver
Wieser, A
Figel, M
Ozer, AM
The dosimetric properties of eight different fluorescent materials (FM) used in production of commercial fluorescent lamps were studied by thermoluminescence (TL). Taking into account the criteria for TL phosphors to be useful for radiation dosimetry, radiation sensitivity, thermal stability, shape of the glow curves, and effect of incandescence, UV and daylight on irradiated and non irradiated material were investigated. It was observed that most of the material can be used for radiation doses from 10 mu Gy to 1 kGy. The radiation induced signal is found to be thermally very stable. The calcium halophosphates doped with Sb and Sb:Mn having a similar mineral phase as teeth and bone may be used for dosimetry in radiation therapy and diagnostics. The strontium borophosphates and barium magnesium aluminate doped with Eu were found to be sensitive to light and may be used in solar energy research.


Microstructure development in nickel zinc ferrites
Okatan, Mahmut Barış; Timuçin, Muharrem; Department of Metallurgical and Materials Engineering (2005)
Nickel zinc ferrites (NZF) have been considered as one of the basic components in high frequency electromagnetic applications especially in the field of telecommunications. In the present study, the aim was to produce high quality nickel zinc ferrite ceramics at low soaking temperatures. For this purpose, conventional ceramic manufacturing method based on mixed oxide precursors was followed using calcium fluoride, CaF2, as sintering additive. During the sintering studies, it was noticed that both the micros...
Structural interpretation of gabbroic rocks in Agacoren Granitoid, central Turkey: field observations and aeromagnetic data
Kadioglu, Yk; Ates, A; Güleç, Nilgün Türkan (1998-03-01)
Gabbroic rocks crop out commonly in different localities of the Central Anatolian Crystalline Complex and are interpreted by many researchers as the remnants of a Neotethyan ophiolitic suite now observed as roof-pendants in the granitoids of the complex. In this study, the structural position of the gabbroic rocks within one of the granitoids of the Central Anatolian Crystalline Complex, namely the Agacoren Granitoid, is determined by geological and aeromagnetic data from the central part of the pluton. The...
Electrical and structural characterization of bismuth thin films
Durkaya, Göksel; Parlak, Mehmet; Department of Physics (2005)
Electrical and structural properties of Bismuth thin films were studied simultaneously. Electrical properties of the Bismuth thin films have been characterized by measuring temperature dependent conductivity and Hall effect. Structural analysis were carried out by X-ray diffraction technique and using a room temperature Atomic Force Microscope (RT-AFM).
Phototransferred thermoluminescence from α-Al2O3:C using blue light emitting diodes
Bulur, Enver (1999-01-01)
Phototransferred thermoluminescence (PTTL) from alpha-Al2O3:C single crystals was studied using a blue light emitting diode (LED) for phototransfer of charges from deep traps to the main dosimetry trap. The dose response was found to be linear in the region from similar to 5 mGy to similar to 5 Gy. It was observed that the corresponding deep traps were located near 500 degrees C and heating to temperatures > 600 degrees C removes the PTTL effect induced by the light from the blue LED. The thermal activation...
Transmission, reflection and thermoluminescence studies on GaS0.75Se0.25 layered single crystals
Delice, S.; IŞIK, MEHMET; Hasanlı, Nızamı (2015-10-01)
Optical and thermoluminescence properties on GaS0.75Se0.25 crystals were investigated in the present work. Transmission and reflection measurements were performed at room temperature in the wavelength range of 400-1000 nm. Analysis revealed the presence of indirect and direct transitions with band gap energies of 2.39 and 2.53 eV, respectively. TL spectra obtained at low temperatures (10-300 K) exhibited one peak having maximum temperature of 168 K. Observed peak was analyzed using curve fitting, initial ri...
Citation Formats
E. Bulur, A. Wieser, M. Figel, and A. Ozer, “Thermoluminescence properties of fluorescent materials used in commercial lamps,” RADIATION PROTECTION DOSIMETRY, pp. 373–379, 1996, Accessed: 00, 2020. [Online]. Available: