Abstract Scintillation dosimeters are high efficiency and resolution devices for 3D dose radiotherapy measurement. Water is the best tissue equivalent material for most types of radiation, thus water-equivalent scintillator is the preferred scintillator for radiotherapy dose measurement. This research paper describes a new method of preparing water-equivalent liquid scintillators (LS). In this study, we first calculated the approximate ratio of each LS component by empirical formula and then used the Monte Carlo program Geant4 to optimize the concentration ratio of the water-equivalent LS. The newly prepared LS was doped with a high-density solvent containing silicon and oxygen. Experimental results showed that the newly developed LS had good water equivalence in different depths, both at high energy (6 MV) and low energy (50 kVp ~ 225 kVp). In addition, its luminous efficiency was superior compared to the commercial ULTIMA Gold™ LS. In conclusion, the Monte Carlo simulation was effective in predicting each component ratio in the water-equivalent LS. Furthermore, the newly prepared LS had excellent luminescence properties and water equivalence and is a potential 3D dose detector.

中文翻译：

---

新型水当量液体闪烁体的研制

摘要 闪烁剂量计是用于3D剂量放疗测量的高效、高分辨率设备。水是大多数辐射类型的最佳组织等效材料，因此水等效闪烁体是放射治疗剂量测量的首选闪烁体。本研究论文描述了一种制备水当量液体闪烁体 (LS) 的新方法。在本研究中，我们首先通过经验公式计算出各 LS 组分的近似比例，然后使用蒙特卡罗程序 Geant4 优化水当量 LS 的浓度比。新制备的 LS 掺杂了含有硅和氧的高密度溶剂。实验结果表明，新开发的LS在高能量（6 MV）和低能量（50 kVp~225 kVp）下在不同深度均具有良好的水当量。此外，与市售的 ULTIMA Gold™ LS 相比，其发光效率更高。总之，Monte Carlo 模拟可有效预测水当量 LS 中的每个组分比例。此外，新制备的 LS 具有优异的发光性能和水当量，是一种潜在的 3D 剂量检测器。