Borate glasses are suitable for thermoluminescent dosimetry. In particular, borate glasses doped with different elements show good characteristics in terms of linearity, sensitivity and effective atomic number. However, these glasses are also hygroscopic, which can reduce their viability as dosimeters. In this work, the characteristics of borate glasses made with lithium and potassium oxides (LKB) were studied. To improve the glass features new formulations adding different amounts of magnesium oxide were developed. Mg improves the stability of the glasses since it reduces the mobility of the alkali ions and thus may reduce the hygroscopicity of the LKB glass. Three glass formulations containing 0,5 and 11mol% of magnesium oxide were produced by wet quenching method in order to determine the effect of Mg specifically on hygroscopicity and high-temperature resistance. The possibility to use this material for optically stimulated luminescence dosimetry was demonstrated. The LKB glass containing 11mol% of Mg was found to withstand higher temperatures and to present the lower hygroscopicity compared to the other formulations.
Production and characterization of H3 BO3 -Li2 CO3 -K2 CO3 -MgO glass for dosimetry
MARINI, ANDREA;CIOLINI, RICCARDO;D'ERRICO, FRANCESCO
2015-01-01
Abstract
Borate glasses are suitable for thermoluminescent dosimetry. In particular, borate glasses doped with different elements show good characteristics in terms of linearity, sensitivity and effective atomic number. However, these glasses are also hygroscopic, which can reduce their viability as dosimeters. In this work, the characteristics of borate glasses made with lithium and potassium oxides (LKB) were studied. To improve the glass features new formulations adding different amounts of magnesium oxide were developed. Mg improves the stability of the glasses since it reduces the mobility of the alkali ions and thus may reduce the hygroscopicity of the LKB glass. Three glass formulations containing 0,5 and 11mol% of magnesium oxide were produced by wet quenching method in order to determine the effect of Mg specifically on hygroscopicity and high-temperature resistance. The possibility to use this material for optically stimulated luminescence dosimetry was demonstrated. The LKB glass containing 11mol% of Mg was found to withstand higher temperatures and to present the lower hygroscopicity compared to the other formulations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
