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Gamma Ray Dosimetric Properties of Tb- and Dy-doped Ba 0.88 Sr 0.12 SO 4 Phosphor
Iranian Journal of Science and Technology, Transactions A: Science ( IF 1.4 ) Pub Date : 2020-08-03 , DOI: 10.1007/s40995-020-00945-w
Kh. Rezaee Ebrahim Saraee , M. Lotfi

The chemical co-precipitation method was used to prepare Ba0.88Sr0.12SO4:Dy1.5mol%,Tb1mol% nanocrystalline powder. Ba0.88Sr0.12SO4:Dy1.5mol%,Tb1mol% pellets were fabricated in order to measure gamma ray irradiation. A main TL glow peak around 207 °C, a small peak at 157 °C and a good linear response for doses in the range of 0.01–5 kGy were observed. The TLE spectra of the pellets were recorded at 207 °C. The results of energy response showed that these pellets are energy dependent. The pellets showed fading about 18% during 4 weeks of storage time. The effect of different heating rates on the TL glow peaks of prepared pellets which were recorded after a gamma exposure of 5 kGy was investigated. The intensity of TL glow curves was decreased by an increase in heating rate from 2 °C/s up to 6 °C/s. The dosimetric results showed that the Ba0.88Sr0.12SO4:Dy1.5mol%,Tb1mol% pellets could be useful for monitoring gamma radiation for accidental dose assessment.



中文翻译:

b和b掺杂的Ba 0.88 Sr 0.12 SO 4荧光粉的γ射线剂量学性质

采用化学共沉淀法制备了Ba 0.88 Sr 0.12 SO 4:Dy 1.5mol%,Tb 1mol%纳米晶粉。Ba 0.88 Sr 0.12 SO 4:Dy 1.5mol%,Tb 1mol%制备颗粒以测量γ射线辐射。在0.01-5 kGy的剂量范围内,观察到一个主要的TL辉光峰在207°C附近,在157°C有一个小峰,并具有良好的线性响应。在207℃下记录粒料的TLE光谱。能量响应的结果表明,这些颗粒是能量依赖性的。在储存的4周时间内,颗粒显示约18%的褪色。研究了不同加热速率对制得的小球的TL辉光峰的影响,在γ射线暴露5 kGy后记录了这些小球。TL辉光曲线的强度随着加热速率从2°C / s到6°C / s的增加而降低。剂量学结果表明Ba 0.88 Sr 0.12 SO 4:Dy 1.5mol%,Tb1mol%的小球可用于监测伽马辐射以进行意外剂量评估。

更新日期:2020-08-04
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