Characterization of thermoluminescence kinetic parameters of beta irradiated B doped Ca-5(PO4)(3)OH powder obtained from eggshell

2021-07-01
Depci, T.
Oglakci, M.
Sezer, Selda
YÜCEL, AYTAÇ
DOĞAN, TAMER
Souadi, G.
TOPAKSU, MUSTAFA
Can, N.
In this study, we have synthesized B doped Ca5(PO4)3OH (HAP) by a sonication chemical method. The thermoluminescence (TL) properties of the family of synthesized samples (B doped Ca5(PO4)3OH (HAP) were investigated using an IRSL-TL 565 nm filter. This gave the highest TL intensity of each phosphor after 2 Gy beta-irradiation. Three TL glow peaks of B doped Ca5(PO4)3OH (HAP) are centered at around 84, 208 and 324 degrees C (with a heating rate of 2 degrees Cs-1). The trapping parameters such as activation energy (E), order of kinetics (b), frequency factor (s) were calculated by using initial rise (IR), various heating rates (VHR) and computerized glow curve deconvolution (CGCD) method. The response of TL glow curves remained constant within +/- 5% deviation from the initial value after 9 cycles of reuse; but only at tenth cycle the deviation goes up to 6%.
APPLIED RADIATION AND ISOTOPES

Suggestions

Study of Sorption of Alcohols on High Silica ZSM-35
Babuçcuoğlu, Yurdaer; Yücel, Hayrettin; Department of Chemical Engineering (2007)
This study investigated the equilibrium sorption capacities and rates of sorption of some alcohols on Na- and/or H- form of ZSM-35 at different temperatures by gravimetric method using an electrobalance. The alcohols studied were methanol, ethanol, propan-1-ol, propan-2-ol, n-butanol. The ZSM-35 sample used in sorption experiments resulted from a study for synthesis of high silica ZSM-35 zeolite. This ZSM-35 sample was called as NaZSM-35. The influence of ion-exchange on the sorption capacity and kinetics w...
Investigation of bioprocess parameters for glucose isomerase production by Bacillus thermoantarcticus
Haykır, Işık; Çalık, Pınar; Department of Chemical Engineering (2007)
In this study, the effects of bioprocess parameters on glucose isomerase roduction by Bacillus thermoantarcticus (DSMZ 9572) were investigated. For his purpose, firstly, in laboratory scale shake-bioreactors, a defined medium was designed in terms of its carbon and nitrogen sources, to achieve the highest glucose isomerase activity. Optimum concentrations of medium components were determined by a statistical approach, namely Response Surface Methodology (RSM). RSM defined the relationship between the respon...
Investigation of the performance of colloidal LiFePO4 particles in suspension flow battery
Yıldız, Bayram; Aşkar, Yasemin; Coşkun, Elif; Maviş, Bora; Çınar, Simge (2021-06-12)
In this study, colloidal LiFePO4 particles were synthesized through solvothermal route. Effect of solvothermal method parameters on formation of colloidal LiFePO4 was investigated. Post-processing treatments were found effective to obtain non-aggregated colloidal particles. The rheological behavior of aqueous suspensions including electroactive material was examined in terms of salt, electroactive material concentration and carbon content. A three-electrode systems was used to analyze electrochemical perfor...
Synthesis and Stimuli-Responsive Properties of Metallo-Supramolecular Phosphazene Polymers Based on Terpyridine Metal Complexes
Sezer, Selda; KÖYTEPE, SÜLEYMAN; GÜLTEK, AHMET; SEÇKİN, TURGAY (2021-08-01)
In this study, terpyridine functionalized phosphazene based metallo-supramolecular polymers were synthesized by three step reaction method. In the first step, 4 '-(4-aminophenyl)-2,2 ':6 ',2 ''-terpyridine was synthesized with p-nitro benzaldehyde and 2-acetylpyridine. Then, the monomer containing six terpyridine (TPY) units attached to the phosphazene was prepared from 4 '-(4-aminophenyl)-2,2 ':6 ',2 ''-terpyridine and hexachlorocyclotriphosphazene by a condensation reaction. Finally, metallo-supramolecula...
Investigation of optical characteristics of PbMoO4 single crystals by spectroscopic ellipsometry
Delice, S.; Isik, M.; Hasanlı, Nızamı; Darvishov, N.H.; Bagiev, V.E. (2022-07-01)
© 2022 Elsevier GmbHIn this study, we investigated the optical properties of PbMoO4 single crystals grown by Czochralski method. Spectroscopic ellipsometry measurements were carried out in the energy region between 1.0 and 5.5 eV at room temperature. X-ray diffraction measurements were achieved for structural characterization. The resulted pattern exhibited one peak belonging to (200) plane. Spectral variations of complex dielectric function, complex refractive index, absorption coefficient and dissipation ...
Citation Formats
T. Depci et al., “Characterization of thermoluminescence kinetic parameters of beta irradiated B doped Ca-5(PO4)(3)OH powder obtained from eggshell,” APPLIED RADIATION AND ISOTOPES, vol. 173, pp. 0–0, 2021, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/97012.