Influence of the stem effect on radioluminescence signals from optical fibre Al2O3:C dosemeters
Influence of the stem effect on radioluminescence signals from optical fibre Al2O3:C dosemeters
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DOI：
10.1093/rpd/nci507
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发表时间：
2006-09-01
影响因子：
1
通讯作者：
Botter-Jensen, Lars
中科院分区：
文献类型：
--
作者：
Marckmann, Carl Johan;Aznar, Marianne C.;Botter-Jensen, Lars
本文分析了切伦科夫辐射和其它噪声源对医用剂量计中光纤Al_2O_3：C剂量计辐射发光信号的影响，即所谓的干效应。光纤剂量计由一个敏感的Al2O3：C晶体耦合到一个光纤电缆，携带RL和光受激发光（OSL）在Al2O3：C晶体中产生的信号。在剂量计的照射期间，可以从RL信号确定实时剂量率，并且在照射之后，从使用聚焦的绿色固态激光器激励的OSL信号确定吸收的总剂量。特别是，分析了纤维中产生的茎效应的成分，以确定它们对RL信号的影响。
This paper analyses the influence of the Cerenkov radiation and other noise sources, the so-called stem effect, on radioluminescence (RL) signals generated in optical fibre Al2O3:C dosemeters used in medical dosimetry. The optical fibre dosemeter consists of a sensitive Al2O3:C crystal coupled to an optical fibre cable that carries the RL and optically stimulated luminescence (OSL) signals generated in the Al2O3:C crystal. During irradiation of the dosemeter, the real-time dose rate can be determined from the RL signal and after irradiation the total dose absorbed is determined from the OSL signal stimulated using a focused green solid-state laser. In particular, the components of the stem effect generated in the fibres were analysed to determine their impact on the RL signal.