Undoped and calcium doped borate glass system for thermoluminescent dosimeter

Structural, thermal and optical properties of CaBO and CaLiBO glasses doped with Eu3+

“…To avoid liquid-liquid phase separation in the preparation of binary CaO-B 2 O 3 glasses high temperatures are required in order to obtain a homogeneous melt [5,14,15]. In this work, the addition of 10 mol% of Li 2 O to the CaB 4 O 7 glass composition prevents this liquid-liquid phase separation by allowing the preparation of glasses at much lower temperatures, as can be noted in MT values in Table 1.…”

“…Rare-earth (RE) doped borate glasses present interesting properties which allow their use in different applications, such as new phosphor materials, fluorescent display devices, radiation detection sensors, optical fibers, as well as, solid-state lasers [1][2][3][4][5]. Calcium borate glasses, particularly in the composition of calcium tetraborate CaB 4 O 7 , are very attractive to evaluate the effects of chemical environment on the optical properties of RE ions by presenting low melting temperature, high thermal stability and no hygroscopicity [5].…”

“…Calcium borate glasses, particularly in the composition of calcium tetraborate CaB 4 O 7 , are very attractive to evaluate the effects of chemical environment on the optical properties of RE ions by presenting low melting temperature, high thermal stability and no hygroscopicity [5]. Furthermore, beyond the fact that borate glasses are advantageous materials for application in radiation dosimetry, they still have an effective atomic number close to that of the human tissue (Z eff = 7.42) [5,6]. Previously, we reported about the thermoluminescence (TL) of Dy 3+ and Li + co-doping calcium borate glass and glass-ceramics that shows an intrinsic TL emission under UV exposure [5,6].…”

“…Furthermore, beyond the fact that borate glasses are advantageous materials for application in radiation dosimetry, they still have an effective atomic number close to that of the human tissue (Z eff = 7.42) [5,6]. Previously, we reported about the thermoluminescence (TL) of Dy 3+ and Li + co-doping calcium borate glass and glass-ceramics that shows an intrinsic TL emission under UV exposure [5,6]. This TL sensitivity is dependent on the trivalent RE dopant, which may form complex defects in borates by creating hole or electron trap centers depending on the boron-oxygen arrangement in the glass structure [6].…”

“…The temperatures used during the melting process were referred to as MT and are presented in Table 1. The preparation process of CaBO glass is described in more details in a previous work [5].…”