Beryllium oxide (BeO) ceramic is a radioluminescent and optically stimulated luminescent material which has been shown to be quite energy independent. However, BeO ceramic is a highly self-optically attenuating material. The aim of this study is to evaluate the effect self-optical attenuation has on the radioluminescence of the BeO ceramic, and how this effects the measured energy dependence. The energy dependence of a BeO ceramic fibre-coupled luminescent dosimeter was measured using a superficial x-ray unit with beams of 30–150 kVp. The energy dependence was measured with the dosimeter oriented parallel and perpendicular to the beam in order to enhance the effect of the self-optical attenuation from the BeO ceramic. From the measurements, energy dependence curves were generated showing the detector response in both orientations. The largest difference in response was >25% observed at the lowest energy.

Monte-Carlo simulations of the dose distribution within the BeO ceramic were convolved with ray tracing modelling of the light collection from the BeO ceramic probe in order to simulate the total detector response. The light collection corrected the Monte Carlo simulation results, and the intrinsic energy dependence was obtained with the trends between the two orientations agreeing within 8%. Therefore, it can be concluded that the measured orientational energy dependence is due to the self-optical attenuation of the BeO ceramic.

氧化铍（BeO）陶瓷是一种放射性发光和光学激发的发光材料，已证明与能量完全无关。但是，BeO陶瓷是一种高度自光学衰减的材料。这项研究的目的是评估自光学衰减对BeO陶瓷的放射发光的影响，以及这如何影响所测得的能量依赖性。BeO陶瓷纤维耦合发光剂量计的能量依赖性是使用表面X射线单元测量的，光束束的大小为30-150 kVp。用剂量计平行于和垂直于光束的取向来测量能量依赖性，以增强来自BeO陶瓷的自光学衰减的效果。通过测量，生成了能量依赖性曲线，显示了两个方向上的检测器响应。

BeO陶瓷中剂量分布的蒙特卡洛模拟与BeO陶瓷探针的光收集的射线追踪模型进行了卷积，以模拟总探测器响应。该光收集校正了蒙特卡洛模拟结果，并且获得了固有能量依赖性，并且两个取向之间的趋势一致在8％之内。因此，可以得出结论，测得的取向能量依赖性是由于BeO陶瓷的自光衰减引起的。