富石英粉体热释光陷阱参数对等效剂量的影响

Influence of Thermoluminescence Trapping Parameter From Abundant Quartz Powder on Equivalent Dose

  • 摘要: 本文使用RGD-3B型热释光仪,获得富石英粉体的发光曲线。在5 K/s的升温速率下,发光曲线呈现448、551、654、756 K 4个峰。用多种升温速率法确定4个发光峰的激活能、频率因子和陷阱电子寿命。在一定激活能范围(0.7~1.86 eV)内,随激活能的增加,等效剂量呈指数增大。温度在548~608 K,等效剂量从54 Gy增至485 Gy;在608~748 K,等效剂量随温度的升高变化不大,在531 Gy附近波动。

     

    Abstract: Glow curves of abundant quartz powder were obtained with the RGD-3B thermoluminescence (TL) reader. TL peaks with 448, 551, 654, 756 K were identified at the heating rate of 5 K/s. The activation energy, frequency factor and lifetime of trapped charge were evaluated at ambient temperature for four peaks by the method of various heating rates. Within a certain range of activation energy, the equivalent dose increases exponentially with the activation energy. The equivalent dose increases from 54 Gy to 485 Gy with the temperature from 548 K to 608 K, and it fluctuates around 531 Gy with the temperature from 608 K to 748 K.

     

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