Thermoluminescence (TL) dosimeter of dysprosium doped strontium borate glass for different glass modifiers (Na, Li, Ca) subjected from 1 to 9 Gy doses

Abstract

Abstract. This article reports TL response for different glass modifier and doping concentration. Alkali oxides (Na2O and Li2O) and alkali earth oxide (CaO) will be used as a glass modifier for strontium borate based glass. The samples were prepared by melt quenching technique. Dy2O3 concentrations ranging from 0.00 to 0.70 mol% and exposure doses of 1 to 9 Gy will be varied. All glass samples exhibit the prominent peak temperature positioned at 186 o C to 232 o C. From all the samples, one of the samples shows an excellent linearity dose response, higher TL and show good reproducibility after 5 cycles exposure which is sodium strontium borate doped with 0.1 mol% Dy2O3 (optimum concentration). IntroductionThermoluminescence dosimeter (TLD) has been widely applied in clinical, personal and environmental of ionizing radiation areas. Borate glass for better dosimeter materials were chosen due to is near tissue equivalent absorption coefficient, high thermal stability, low melting point and good solubility of rare earth ions [1]. The hygroscopic behavior of pure borate glass represents a serious drawback since humidity has often gives contrary effect on the performance of TL materials. Therefore, many investigations have been conducted to improve the performance of borate based dosimeters and explore the new TL materials. Strontium tetraborate is one of the potential candidates since it is not hygroscopic as normally exhibited by other borate compounds [2]. It is reported that the sensitivity of polycrystalline dysprosium doped strontium tetraborate is five times higher compared to LiF: Mg, Ti [3].Up to now, there are no research study TLD properties on strontium borate glass system. So, in this study strontium borate glass with different modifiers alkali oxides (Na2O and Li2O) and alkali earth oxide (CaO) in glassy form and have investigated for the first time its thermoluminescence dosimeter (TLD) properties. Alkali oxide and alkali earth oxides are very good materials for modifying borate glasses because of their possible applications in radiation absorbent. [4,5]. The addition of dysprosium (Dy) as an activator was chosen in this research to enhance the high TL efficiency [6]. The aims of this study is to investigate the TL properties of dysprosium doped with different modifiers (Na2O, Li2O and CaO) of strontium borate glasses exposed to 60 Co Gamma irradiation. The best modifier of strontium borate glass with optimum concentration of Dy doping will gives the best TL properties such as glow curve, TL dose response, reproducibility, sensitivity to radiation and fading characteristics of the response. A small amount of dysprosium oxide (Dy2O3) was added to confirm the role as activator on TL dosimetry response.

Preparation and Thermoluminescence Properties of Polycrystalline Na2SO4/SiO2 composite

“…Reproducibility is one of the most important properties of TL qualities to determine the reusability of the samples [17]. In other words, the TL intensity signal of a given dosage should be about the same after several measurements.…”

Description and dosimetric features of lithium borate glass doped with transition metals for thermoluminesce, a re-evaluation

“…For several generations, ionising radioactive material has been used in a vast scope of applications in diverse of sectors e.g., practice of medicine, age determination, and nuclear power (Hamzah et al 2017). Each application requires a different level of radiation exposure.…”

“…whereas phosphorescence has a time delay of T 10 −8 Sec. Furthermore, a proper excitation source accelerates the photoluminescence activity, that further categorises the luminescent operation dependent on the excitation source (Hamzah et al 2017). The method is termed as visible light stimulated luminescence when light is utilised as the source of excitation.…”

“…They oversee the transition from the ground state of the Dy 3+ ion (6H 15/2 ) to the excited states (4I 15/2 , 6F 3/2 , 6F 5/2 , 6H 5/2 , 6F 9/2 , 6H 9/2 , and 6H 11/2 ) as seen in table 6. However, the RE ions have three extremely sensitive and powerful absorption peaks known as the S = 0, L 2 and J 2 oversensitive transitions (Hamzah et al 2017). A hypersensitive peak with a centre wavelength of 1265 nm, this corresponds to the 6H 15/2 6H 9/2 transition.…”

Structural Properties of Al-Li-Zn Borate glass activated with Dy3+ for Radiation Dosimeter

“…This study investigates the significant impact of Dy3+ on the structural and optical properties of the Al-Li-Zn borate glass system, aiming to explore its potential for thermoluminescence dosimetry. X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) techniques are employed to analyse the structural properties (Alajerami et al, 2019;Hamzah et al, 2017). The physical properties, including density and molar density, are determined using the Archimedes principle.…”